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Shchedrina, Z. G.; Mayer, E. M. (1975). О различных формах Ammonia beccarii (Linne) - About different forms of Ammonia beccarii (Linne). Комплексные исследования природы океана. М.: Изд-во МГУ, Вып. 5.-Complex investigations of oceans nature, part 5-Moskovskogo Univ. Izdat. 249-261, pl. 1-4.