Sikes, J.H. 1931 The effects of contact insecticides upon the obscure scale, Chrysomphalus obscurus (Comstock) [microform].. [microform] 40 leaves
Notes: Thesis (M.S. in Agriculture)--Agricultural and Mechanical College of Texas, 1931.
Sikes, J.H. 1931 The effects of contact insecticides upon the obscure scale, Chrysomphalus obscurus (Comstock) [microform].. [microform] 40 leaves
Notes: Thesis (M.S. in Agriculture)--Agricultural and Mechanical College of Texas, 1931.