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Some of the principal insect enemies of coniferous forests in the United States.

By Hopkins, A. D..
Washington, 1903 .
p. 265-282. , In: United States, Dept of agriculture. Yearbook, 1902, p. 265-282. illus., pl. xxviii-xxix. 23 cm. Washington, 1903. 23 cm..

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Technical papers on miscellaneous forest insects. I. Contributions toward a monograph of the bark-weevils of the genus Pissodes.

By Hopkins, A. D..
Washington, Govt. Print. Off., 1911 .
x, 68 p. 23 cm..

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Technical papers on miscellaneous forest insects. III. A revision of the powder-post beetles of the family Lyctida of the United States and Europe.

By Kraus, Ezra J..
Washington, Govt. Print. Off., 1911 .
iii p., p. 111-138. 23 cm..

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