Arthey, V. D. The effect of pre-blossom defoliation on the cropping of cox's orang e pippin apple / V. D. Arthey and E. H. Wilknson. - Kent : Wye College, [n.d]. - 1v. (various pagings) : ill. ; 25 cm. - Reprint no. 266 new series . Includes bibliographical references. Subjects--Topical Terms: Apples --Growth.------ Dewey Class. No.: 630.7114223