Ingels, Jack E. Landscaping : principles and practices / Jack E. Ingels. - 7th ed. - Clifton Park, NY : Thomson/Delmar Learning, c2009. - xvii, 494 p. : ill. (some col.), map ; 24 cm. ISBN: 1401834108 LCCN: 2002041558 Subjects--Topical Terms: Landscape architecture.Landscape gardening.Landscaping industry. LC Class. No.: SB472 / .I53 2004 Dewey Class. No.: 712