00917nam0-22002891i-450-99000206199040332120090504113804.0000206199FED01000206199(Aleph)000206199FED0100020619920030910d1952----km-y0itay50------baengSystemic insecticidespaper read to the 3rd International congress of crop protection on September 17th, 1952, at the Sorbonne, ParisW. E. RipperParis[s.n.]195256 p.25 cmInsetticidi632.951Ripper,Walter Eugene<1908-1965>International congress of crop protection<3. ;1952 ;Parigi>ITUNINARICAUNIMARCBK99000206199040332161 IX E.1/19DAGENDAGENSystemic insecticides393022UNINA