Some of the principal insect enemies of coniferous forests in the United States. - Hopkins, A. D. (Andrew Delmar), 1857-1948. (Washington, 1903)
In: United States, Dept of agriculture. Yearbook, 1902, p. 265-282. illus., pl. xxviii-xxix. 23 cm. Washington, 1903.
Also available in digital form on the Internet Archive Web site.
Keywords: Forest insects