Report on the terrestrial Mollusca collected by the Percy Sladen expedition to Lake Titicaca, 1937
Crawford, G.I. (1939). Report on the terrestrial Mollusca collected by the Percy Sladen expedition to Lake Titicaca, 1937. Proc. Malac. Soc. 23(6): 318-332
In: Proceedings of the Malacological Society of London. Dulau & Co.: London. ISSN 0025-1194, meer
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