Lower Pliocene mollusks and echinoids from the Los Angeles basin, California and their inferred environment,
by W. P. Woodring.
- Washington, U.S. Govt. Print. Off., 1938.
- ii, 67 p. incl. illus., tables. 9 pl. (incl. maps (part fold.) fold. diagr.) 29 cm.
At head of title: United States Department of the Interior.