00575    a2200169   4500020001500000082001500015100002400030245004600054260007900100300001800179440005000197650004100247650003500288650004700323700001700370700001800387  a9251021090  a632.9bREI  aReichelderfer, K. H  aEconomic guidelines for crop pest control  aRomebFood and Agriculture Organization  of the United Nationsc1984g1984  aix,93p.c30cm  aFAO plant production and protection paper  58  aAGRICULTURE AND RELATED TECHNOLOGIES  aPLANT INJURIES ,DISEASES,PESTS  aGENERAL TOPICS OF PEST AND DISEASE CONTROL  aNorton, G. A  aCarlson, G. A