Beynon, K. I. Persistence of insecticides and herbicides ; papers presented at a Symposium... - (London) : British Crop Protection Council, 1976 - 277 p. - British Crop Protection Council. Monograph ; 17 . - British Crop Protection Council. Monograph ; 17 . LCCN: 15873 Subjects--Topical Terms: Herbicidas.Insecticidas. Dewey Class. No.: 632.951 / B4