TY  - BK
AU  - Hill,C.C.
AU  - Pinckney,J.S.
AU  - Udine,E.J.
TI  - Method of estimating reduction in yield of wheat caused by Hessian fly infestation
T2  - Circular United States Department of Agriculture
PY  - 1943///
CY  - Washington, DC (USA)
PB  - U.S. Department of Agriculture, 
ER  -