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                  <gco:CharacterString>This dataset is composed of the following sources:  (1) I. Elskens (1972). Nutrients et paramètres biologiques associés.in: Modèle Mathématique, Rapport de synthèse, Journées d'études des 24 et 25 novembre 1971 (DITS 1112).  (2) Prof. I. Elskens (1975). Croisiere B7 (7-11 avril 1975) et B8 (20-24 mai 1975).1975/05 CHIM.01 (3) Jacques C.J. Nihoul, P. Polk (1977). Projekt Zee Eindverslag Boekdeel 8: Trofische ketens en cyclus der nutrienten; Projet Mer Rapport Final Volume 8: Chaines trophiques et cycles des nutrients.d/1976/1191/8 (4) Prof I. Elskens, Mme D. Janssen (n.d.). Bepaling van nitraat en nitriet: Kruisvaart januari 1973.1973/00: CHIM.05 (5) Prof. Y Elskens, Mme D. Janssen (n.d.). Concentration en nitrates et nitrites: Croisière JONSDAP Sep-Oct 1973.1973/06 CHIM.01 (6) Prof. I. Elskens (n.d.). Croisere B11 - 7-11 juillet 1975.1975/07 CHIM.01 (7) Prof. I. Elskens (n.d.). Croisiere A1 - 28 avril - 9 mai 1975.1975/05 CHIM.02 (8) Prof. I. Elskens (n.d.). Croisiere B9 (2-6 juin 1975) et B10 (16-20 juin 1975).1975/06 CHIM.01 (9) Determination de la concentration en azote sous la forme nitrate et nitrite: Croisière 6 - Septembre 1972.1972/04:CHIM.02 (10) Determination de la concentration en azote sous la forme nitrates et nitrites: Croisière 7 - Octobre 1972.1972/05: CHIM/04 (11) Prof. I. Elskens, Dr. Janssens (n.d.). Determination des concentrations en nitrate et nitrite.1971/00: CHIM.01 (12) Determination des concentrations en nitrates et nitrites.1973/08 CHIM.02 (13) Y. Elskens, D. Janssen (n.d.). Determination des concentrations en nitrates, nitrites, amoniaque, phosphates et silice: Croisière A3, mars 1974.1974/03 CHIM.02 (14) Determination des concentrations en nitrates, nitrites, amoniaque, phosphates et silice: Croisière P 3 (27 mai au 1 juin 1974).1974/05 CHIM.04 (15) Determination des concentrations en nitrates, nitrites, phosphates et silice: Croisière P1 - Janvier 1974.1974/01 CHIM.02 (16) Determination des concentrations en nitrates, nitrites, phosphates, silice et amoniaqe: croisière auxiliaire - février 1974.1974/02 CHIM.01 (17) Prof. I. Elskens, Dr. D. Janssens (n.d.). Determination des concentrations en nitrite et nitrate.1971/01: CHIM.01 (18) Determination des concentrations en nitrites et nitrates: Croisière B1 - 6 au 11 janvier 1975.1975/01 CHIM.02 (19) Determination des concentrations en nitrites, nitrates et ammoniaque: Croisière B3 - 3 au 8 fevrier 1975.1975/02 CHIM.03 (20) Determination des concentrations en nitrites, nitrates et ammoniaque: Croisière P7 - 18 au 23 novembre 1974.1974/11 CHIM.01 (21) Determination des concentrations en nitrites, nitrates, ammoniaque, phosphates et silice: Croisière B4 - 17 au 22 fevrier 1975.1975/02 CHIM.02 (22) Determination des concentrations en nitrites, nitrates, ammoniaque, phosphates et silice: Croisière B5 - 3 au 8 mars 1975 et Croisière B6 - 17 au 22 mars 1975.1975/03 CHIMIE 01 (23) Prof. Elskens, Mme Janssen (n.d.). Determination des concentrations en phoshpates: Croisière Avril - Mai 1973.1973/02: CHIM.03 (24) Determination des concentrations en phosphates et silice: Croisière B3 - 3 au 8 fevrier 1975.1975/02 CHIM.01 (25) Determination des concentrations en silice et phosphates: Croisière A4 - 10 et 11 juin 1974.1974/06 CHIM.01 (26) Determination des concentrations en silice et phosphates: Croisière P2 - 16 avril au 11 mai 1974.1974/05 CHIM.03 (27) Determination des concentrations en silice, phosphates et ammoniaque: Croisière P1 - 6 au 11 janvier 1975.1975/01 CHIM.01 (28) Determination des concentrations en silice, phosphates, nitrites, nitrates et ammoniaque: Croisieère P6 - 21 au 28 octobre 1974.1974/10 CHIM.01 (29) Determination des concentrations en silice, phosphates, nitrites, nitrates et ammoniaque: Croisière A - 9 et 10 septembre 1974.1974/09 CHIM.01 (30) Determination des concentrations en silice, phosphates, nitrites, nitrates et ammoniaque: Croisière P4 - 15 au 20 juillet 1974.1974/07 CHIM.01 (31) Determination des concentrations en silice, phosphates, nitrites, nitrates et ammoniaque: Croisière P5 - 16 septembre au 5 octobre.1974/09 CHIM.02 (32) Prof I. Elskens, Mme D. Janssen (n.d.). Determination des concentrations en silice: Croisière 1 - Janvier 1973.73/00: CHIM.03 (33) Prof. Y. Elskens, Mme D. Janssen (n.d.). Determination des concentrations en silice: Croisière 4 - Juin-Juillet 1972.1972/03: CHIM.03 (34) Prof I. Elskens, Mme D. Janssen (n.d.). Determination des concentrations en silice: Croisière 7 - Octobre 1972.1972/05: CHIM.03 (35) Prof. Y Elskens, Mme D. Janssen (n.d.). Determination des phosphates et de la silice: Croisière JONSDAP Sep-Oct 1973.1973/06 CHIM.02 (36) I. Elkens, D. Janssen (n.d.). Dosage de l'ammoniaque: Croisière JONSDAP Sept-Oct 1973.1973/06 CHIM.03 (37) I. Elskens, D. Janssen (n.d.). Dosage de l'ammoniaque: Croisière janvier 1974.1974/01 CHIM.01 (38) I. Elkens, D. Janssen (n.d.). Dosage de l'ammoniaque: Croisière juin 1973.1973/04 CHIM.04 (39) I. Elkens, D. Janssen (n.d.). Dosage de l'ammoniaque: Croisière novembre 1973.1973/08 CHIM.01 (40) Prof. I. Elskens, Mme D. Janssen (n.d.). Dosage de la silice dissoute: Croisière P 3 - Juin 1973.1973/04: CHIM.03 (41) Prof I. Elskens, Mme D. Janssen (n.d.). Dosage de la silice dissoute: Croisière P2 Avril 1973.1973/02: CHIM.05 (42) Dosage de la silice dissoute: Croisière auxiliaire - Mars 1973.1973/03: CHIM.01 (43) Dosage des phosphates.1972/03 : CHIM.02 (44) Professeur I. Elskens, Mme D. Janssen (n.d.). Dosage des phosphates: Croisière 1 - Janvier 1973.1973/00: CHIM.04 (45) Dosage des phosphates: Croisière 7 - Octobre 1972.1972/05-CHIM.02 (46) Prof I. Elskens, Mme D. Janssen (n.d.). Dosage des phosphates: Croisière auxiliaire - Mars 1973.1973/03: CHIM.02 (47) Prof. Y. Elskens, Mme D. Janssen (n.d.). Dosage nitrate et nitrite: Croisière 1 - Janvier 1972.1972/01: CHIMIE 02 (48) Prof. Y. Elskens, Mme D. Janssen (n.d.). Dosage phosphates.1972/02-RAD-CHIM.03 (49) Prof. Y. Elskens, Mme D. Janssen (n.d.). Dosage silice dissoute: Croisière 4 Point fixe (decembre 1971).1971/POINT FIXE: CHIM 03 (50) Prof I. Elskens, Mme D. Janssen (n.d.). Dosages des nitrates et nitrites: Croisière P2 Avril 1973.1973/02: CHIM.04 (51) Prof I. Elskens, Mme D. Janssen (n.d.). Dosages des nitrates et nitrites: Croisière P3 - 1973.1973/04: CHIM.01 (52) Prof I. Elskens, Mme D. Janssen (n.d.). Dosages des nitrates et nitrites: Croisière auxiliaire du 19 mars au 6 avril 1973.1973/03: CHIM.03 (53) Prof. Y. Elskens, Mme D. Janssen (n.d.). Dosages nitrate et nitrite: Croisière 4 Point fixe (decembre 1971).1971/POINT FIXE: CHIM 02 (54) Prof. Y. Elskens, Mme D. Janssen (n.d.). Dosages nitrates et nitrites; phosphates: Croisière 2 "Radiale" - Avril 1972; croisière Escaut (20-24 mars 1972).1972/02.RAD.:CHIMIE:01 (55) Prof. I. Elskens, Dr. D. Janssens (n.d.). Dosages phosphates.1971/01: CHIM.02 (56) Professeur I. Elskens, Mme Janssen (n.d.). Dosages phosphates: Croisière 1 - Janvier 1972.1972/01: CHIM.01 (57) Prof. I. Elskens, Mme Janssen (n.d.). Dosages phosphates: Croisière 4 Point fixe (decembre 1971).1971/POINT FIXE: CHIM 01 (58) Prof. Y. Elskens, Mme D. Janssen (n.d.). Dosages silice dissoute.1972/02-RAD-CHIM:04 (59) O. Beckers (n.d.). La silice en mer du nord.1973/CHIM.-SYNTHESE 04 (60) Dir. Prof. R. Wollast (n.d.). Mer du nord janvier 1974 SiO2 diss.1974/01 CHIM.03</gco:CharacterString>
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                           <gmd:protocol>
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                           <gmd:protocol>
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         <gmd:language>
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                              <gmd:CI_Citation>
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                           <gmd:code>
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                           <gmd:code>
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                           <gmd:onlineResource>
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                                 <gmd:linkage>
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                                    <gco:CharacterString>http</gco:CharacterString>
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                              <gco:CharacterString>An HTTP link to view information</gco:CharacterString>
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