On the interrelationship and the zoogeography of northern species of Yoldia Möller, s. str. (Mollusca, Fam. Ledidae)
Ockelmann, K.W. (1954). On the interrelationship and the zoogeography of northern species of Yoldia Möller, s. str. (Mollusca, Fam. Ledidae). Meddelelser om Grønland, 107(7). C.A. Reitzel: Copenhagen. 32 pp.
Deel van: Meddelelser om Grønland. C.A. Reitzel: Copenhagen. ISSN 0025-6676, meer
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