Philipson, William Raymond. The vascular cambium : its development and activity / /by W. R. Philipson, Josephine M. Ward and B. G. Butterfield. - London : Chapman & Hall, 1971. - 182 p. : ill. ; 25 cm. 'Distributed in the U.S.A. by Barnes & Noble, inc.' Includes bibliographies. ISBN: 0412104008 Subjects--Topical Terms: Cambium.