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Editorial Note: ProfessorSteemann Nielsen has asked that his symposium contribution be presented here only in form of an abstract since investigations, carried out after the Symposium, appeared to make it necessary to alter the last part of the paper. Further experiments have shown, however, that the originally presented theory was entirely correct. (See also text of abstract.)
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Nielsen, E.S. Laboratory experiments with plankton algae as a means to understand primary production. Helgolander Wiss. Meeresunters 15, 135–136 (1967). https://doi.org/10.1007/BF01618616
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DOI: https://doi.org/10.1007/BF01618616