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Schilder F.A. & Schilder M. (1938-1939). Prodrome of a monograph on living Cypraeidae. Proceedings of the Malacological Society of London. 23(3): 109-180 [15 November 1938]; 23(4): 181-252 [15 March 1939].
Schilder F.A. & Schilder M. (1938-1939). Prodrome of a monograph on living Cypraeidae. Proceedings of the Malacological Society of London. 23(3): 109-180 [15 November 1938]; 23(4): 181-252 [15 March 1939].