Denisen, Erwin L Principles of horticulture / Ervin L. Denisen. - 2nd ed. - New York : Macmillan, c1979. - xi, 483 p. : ill. ; 26 cm. Includes bibliographical references and index. ISBN: 0023283807 (Hb.) Subjects--Topical Terms: Horticulture. LC Class. No.: SB418 / .D46 1979