Illustrated key to west North American pelecypod genera,
by A. Myra Keen ... and Don L. Frizzell ...

APA Citation

Keen, A. Myra (Angeline Myra)., Frizzell, D. Leslie. (1939). Illustrated key to west North American pelecypod genera. Stanford University, Calif.: Stanford university press.

MLA Citation

Keen, A. Myra (Angeline Myra), 1905-1986, and Donald Leslie Frizzell. Illustrated Key to West North American Pelecypod Genera. Stanford University, Calif.: Stanford university press, 1939.