00326nam a22001217a 4500003000400000020001800004082001800022245004000040260008400080300000800164440002000172546001200192OSt  a0-85135-089-5  a632.9bCEN/PE  aPest control in tropical root crops  aLondonbCenter for overseaspest research,ministry of overseas devolopmentc1978  a235  aPans manual v4  aEnglish