Relative insecticidal value of commercial grades of pyrethrum
By: by C.C. McDonnell ... [et al.].
Contributors: McDonnell, C. C. 1875-; United States. Dept. of Agriculture.
Series: Technical bulletin / United States Department of Agriculture -- no. 198; Technical bulletin (United States. Dept. of Agriculture) -- no. 198.
Publisher: U.S. Dept. of Agriculture
Published: 1930
Place of publication: Washington
Language: eng
Number of pages: 10
Subjects: Pyrethrum (Plant)
Notes: Caption title.

Literature cited: p. 9.