Morris, Percy A., 1899- A field guide to shells of the Pacific coast and Hawaii : including shells of the Gulf of California / by Percy A. Morris - 2nd ed., revised and enlarged - Boston : Houghton Mifflin, 1966 - 297 p. : ill., (part col.) ; 19 cm. ISBN: 0395080290 LCCN: 66-010192 Subjects--Topical Terms: Shells--Identification Subjects--Geographic Terms: Mollusks--Pacific coastMollusks--Hawaiian Islands