000 00298 a2200121 4500
080 _a632.951
_bM 588 M
245 1 _aMode of action of organic insecticides
_cby R.L. Metcalf
260 _aWashington
_c1948
650 _aInsecticides
100 1 _aMetcalf, R.L.
_d
300 _a84 p.
901 _a34845
999 _c46728
_d46728