Tephrosia as an insecticide --
Subtitle: a review of the literature
By: by R.C. Roark ...
Published: 1937
Place of publication: Washington, D.C
Language: eng
Number of pages: 165
Notes: Cover-title.

At head of title: U.S. Dept. of Agriculture. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations.

Mimeographed.

Bibliography, p. 111-165.