Morris, P. A. (1960). A field guide to shells of the pacific Coast and Hawaii. Boston: Houghton Mifflin company.
शिकागो स्टाइल उद्धरणMorris, Percy A. A Field Guide to Shells of the Pacific Coast and Hawaii. Boston: Houghton Mifflin company, 1960.
एमएलए उद्धरणMorris, Percy A. A Field Guide to Shells of the Pacific Coast and Hawaii. Boston: Houghton Mifflin company, 1960.
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