564
Bas
S
Bassler, Ray Smith, 1878-
Shelled invertebrates of the past and present, with chapters on geological history by Ray S. Bassler [and others;]. [New York] Smithsonian [c1931, c1934]
365 p. ilus., lams (algs. color.) 23 cm. (Smithsonian Scientific Series, 10)
"Selected bibliography": p. 357