Conover, Herbert S. Grounds maintenance handbook / Herbert S. Conover. - 3rd ed. - New York : McGraw-Hill, c 1977. - vii, 631 p. : ill. ; 23 cm. Includes index. 319 319 ISBN: 0-07-012412-4 Subjects--Topical Terms: Grounds maintenance. Dewey Class. No.: 635.9 / C763g