Ingels, Jack E. Ornamental horticulture : science, operations and management / Jack E. Ingels. - 2nd ed. - New York : Delmar Pub., c1994. - xxi, 554 p. : ill. ; 23 cm. Glossary : p. 525 - 535. References : p. 540 - 546. ISBN: 0827363648 Subjects--Topical Terms: Ornamental horticulture.