00432nam a2200145Ia 4500008004100000082001800041100002300059245004100082260005000123300000800173650004100181650003400222653001400256653001600270170901s1951    xx            000 0 und d  a632.951bS37C  aShepard, Harold. H 0aChemistry and Action of Insecticides  aNew YarkbMcGraw-Hill Book Company, Incc1951  a504  aAgriculture and related technologies  aTechnology (Applied sciences)  aChemistry  aInsecticide