Barkbeetle enemies of California forests.
Prepared by Bureau of entomology and plant quarantine, U.S. Department of agriculture, in cooperation with State emergency relief administration--Project 3F-2-302, and Emergency educational program.
|Corporate Author:||United States.|
Berkeley, Cal., 1935.
On cover: ... Prepared for School of forestry and conservation, University of Michigan.
Title-page illustrated in colors.
3 L. 26 col. mounted pl.
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