The story of the winged-S, with new material on the latest development of the helicopter;

Map on lining-papers.

The story of the winged-S, with new material on the latest development of the helicopter;

"Published October 1938 ... Fourth printing November 1941."

The story of the winged-S : an autobiography.

Mode of access: Internet.

The story of the winged-S.

Mode of access: Internet.

Control of aphids. Hearings before the Special Subcommittee on Aphid Infestation on H. R. 10502 [and others] April 24, 1956.

"Serial no. 84-XX."

Aphids of the Rocky Mountain region : including primarily Colorado and Utah, but also bordering area composed of southern Wyoming, southeastern Idaho and northern New Mexico /

Includes index.

List of the Diptera or two-winged flies.

Bibliography: p. 195-315.

Studies on the germ cell of aphids.

Bibliography: p. 21.

Revision of the North American Empidæ--a family of two-winged insects.

From the Proceedings of the United States National Museum, vol. XVIII, p. 387-440.

A revision of the North American aphids of the genus Myzus /

Copy 2: Amer. Ent. Soc. QL523.A6M3.

Important biological and morphological characteristics of the foliar-feeding aphids of pecan /

Issued May 1978.