Keen, A. M. (1952). Illustrated key to west North American gastropod genera. Stanford University Press.
Chicago Style (17th ed.) CitationKeen, A. Myra. Illustrated Key to West North American Gastropod Genera. Stanford: Stanford University Press, 1952.
MLA (9th ed.) CitationKeen, A. Myra. Illustrated Key to West North American Gastropod Genera. Stanford University Press, 1952.
Warning: These citations may not always be 100% accurate.