current perspectives : proceedings of a symposium Walker, Allan. British Crop Protection Council text Farnham, Surrey, UK The Council c1991 monographic ix, 233 p. : ill. ; 24 cm. organised by the British Crop Protection Council, held at the University of Warwick, Coventry, UK, 25th-27th March, 1991. "Edited by Allan Walker"--Cover. Pesticides Environmental aspects Congresses Soil pollution Congresses Water Pollution Congresses TD879.P37 P46 1991 628.5/2 0948404515 93129202 UOEL 000 20150413091522.0 4893663