Knipling, Edward Fred. 1948. Livestock insects and their control, with comments on the new insecticides. In Proceedings of the fifty-second annual meeting of the United States Livestock Sanitary Association. Denver: United States Livestock Sanitary Association. , 1948

Knipling, Edward Fred. 1948. Livestock insects and their control, with comments on the new insecticides. In Proceedings of the fifty-second annual meeting of the United States Livestock Sanitary Association. Denver: United States Livestock Sanitary Association. , 1948, VI.A, Box: 25, Folder: 1288. Edward Fred Knipling Papers, MS0210. National Agricultural Library Special Collections. http://localhost:8081/repositories/4/archival_objects/74162 Accessed October 14, 2026.