M.  A. Keen, An abridged check list and bibliography of west North American marine Mollusca. Stanford & London: Stanford University Press & Oxford University Press, 1937, p. 84 [+3].

M.  A. Keen, An abridged check list and bibliography of west North American marine Mollusca. Stanford & London: Stanford University Press & Oxford University Press, 1937, p. 84 [+3].