> Mehrbändiges Werk
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Spec.,1:
Plankton investigations of the Danish Lakes Spec.,1 Text with English summary of contents by C. Wesenberg-Lund
Copenhagen: Gyldendalske Bogh., 1904
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Spec.,2:
Plankton investigations of the Danish Lakes Spec.,2 Appendix by C. Wesenberg-Lund
Copenhagen: Gyldendalske Bogh., 1904