Statement of collecting stations in the Spring 1940 Steinbeck-Ricketts Gulf of California trip 1940
Ricketts, Edw. F and Calvin, Jack: Between Pacific Tides, First Edition 1930-1994
Ricketts & Calvin--Between Pacific Tides, 2nd Edition 1948-1985
Ricketts & Calvin--Between Pacific Tides, 2nd Edition 1941-1948