Control black flies
By: Bureau of Entomology and Plant Quarantine, Agricultural Research Administration, U.S. Dept. of Agriculture
Publisher: Bureau of Entomology and Plant Quarantine, Agricultural Research Administration, U.S. Dept. of Agriculture
Published: 1952
Place of publication: [S.l.]
Language: eng
Subjects: Control; Simuliidae
Notes: At head of title: "EC-20."

"March 1952."