Ingels, Jack E. Ornamental horticulture : science, operations & management / Jack E. Ingels. - 2nd ed. - Albany, N.Y. : Delmar Publishers, c1994. - xxi, 554 p. : ill. (some col.) ; ISBN: 0827363648 (text) Subjects--Topical Terms: Ornamental horticulture. LC Class. No.: SB404.9 / .I54 1994 Dewey Class. No.: 635.9