A digest of the literature of derris (deguelia) species used as insecticides, 1747-1931 /
by R.C. Roark.

APA Citation

Roark, R. C. (Ruric Creegan). (1932). A digest of the literature of derris (deguelia) species used as insecticides, 1747-1931. Washington, D.C.: U.S. Dept. of Agriculture.

MLA Citation

Roark, R. C. (Ruric Creegan). A Digest of the Literature of Derris (deguelia) Species Used As Insecticides, 1747-1931. Washington, D.C.: U.S. Dept. of Agriculture, 1932.

Warning: These citations may not always be complete (especially for serials).