Katob, M.A. Induction of parthenocarpic fruit in cox's orange pippin apples / M.A. Katob and W.W. Schwabe. - Ashford, Kent : Wye College, University of London, 1971. - 89-93 p. : ill. ; 26 cm. - Reprint ; no. 487 . Includes bibliographical references: p. 91-93 Subjects--Topical Terms: Plant hormones. Apples.