Relative insecticidal value of commercial grades of pyrethrum
- Source:
- Technical bulletin (United States. Dept. of Agriculture) ; no. 198 1930
- Year:
- 1930
- Subject:
- Pyrethrum (Plant)
- Format:
- 10 p. ; 23 cm.
- Publisher:
- U.S. Dept. of Agriculture
- Collection:
- Organic Roots Collection