The Baltic Sea
Kullenberg, G. (1983). The Baltic Sea, in: Ketchum, B.H. (Ed.) Estuaries and enclosed seas. Ecosystems of the World, 26: pp. 309-335
In: Ketchum, B.H. (Ed.) (1983). Estuaries and enclosed seas. Ecosystems of the World, 26. Elsevier Scientific: Amsterdam. ISBN 0-444-41921-7. 500 pp., meer
In: Goodall, D.W. (Ed.) Ecosystems of the World. Elsevier Scientific: Amsterdam. ISSN 0167-4579, meer
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