Youngner, V.B. The biology and utilization of grasses / by V.B. Youngner and C.M . Mackell - New York : Academic Press, 1972. - xix, 426 p. : ill. ; 24 cm. - Physiological ecology: a series of monographs, texts and treatises. . Includes bibliographical references. Subjects--Topical Terms: Grasses.-------- Dewey Class. No.: 584.9