TY - BOOK AU - Bishopp,F.C. TI - Housefly control T2 - U.S. Dept. of agriculture AV - RC117.F6 B5 PY - 1939///] CY - Washington PB - U.S. Govt. Print. Off. KW - Flies N1 - Contribution from Bureau of entomology and plant quarantine ER -