- Projekt Zee - Belgian part of the North Sea datasets 1970-1976, more
- Projekt Zee - Biotic data of the Belgian part of the North Sea 1970-1976, more
- Projekt Zee - Phytoplankton of the Belgian part of the North Sea 1970-1976, more
- Total phytoplankton inventory in the Southern Bight of the North Sea in 1971, more
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