British Crop Protection Conference--Pests and Diseases : 9th British Insecticide
British Crop Protection Council.
British Crop Protection Conference--Pests and Diseases : 9th British Insecticide - Croydon, Eng BCPC Publications 1981 - 3 v. ( xviii, 930 p
632.952/.952(063) / B862P
British Crop Protection Conference--Pests and Diseases : 9th British Insecticide - Croydon, Eng BCPC Publications 1981 - 3 v. ( xviii, 930 p
632.952/.952(063) / B862P