Methods of forecasting and warning on the appearance of pests and diseases in crops
английский/Methods of forecasting and warning on the appearance of pests and diseases in crops / [By] I. Ja. Poliakov, Prof. ....Methods of forecasting and warning on the appearance of pests and diseases in crops / [By] I. Ja. Poliakov, Prof. ....Methods of forecasting and warning on the appearance of pests and diseases in crops.M./, 1958 ( ). - 1958. - 20 с. ; 22 см см. - (Report of the Soviet delegation / IX International conference on quarantine and plant protection against pests and diseases. Aug. 1958).Methods of forecasting and warning on the appearance of pests and diseases in crops. M., 1958 .С14-12/International conference on quarantine and plant protection against pests and diseases (; 1958; Moscow)/Poliakov ./