|Author:||McDonnell, C. C.|
|Title:||Relative Insecticidal Value of Commercial Grades of Pyrethrum.|
|Publication info:||Beltsville, MD: U.S. Department of Agriculture, National Agricultural Library, Alternative Farming Systems Information Center
|Rights/Permissions:||Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S.|
Relative Insecticidal Value of Commercial Grades of Pyrethrum.
McDonnell, C. C.
Washington DC: : United States Department of Agriculture, July 1930