Taylor, H. F. Xanthoxin : a new naturally occuring plant growth inhibitor / H.F. Taylor and R.S. Burden. - Ashford, Kent : Wye College, University of London, 1970. - ill. : 26 cm. - Reprint ; no. 471 . Reprinted from nature, vol. 227, no. 5255, p. 302-304. Subjects--Topical Terms: Plant growth inhibiting substances.