Hitchcock, Albert Spear. Manual of the grasses of the United States - 2 ed. - Washington : GovernmentPrinting Office, 1950 - 1051 p. : ilus. LCCN: 15820 Subjects--Topical Terms: Botánica--E.U.A.GramÃneas. Dewey Class. No.: 584.90973 / H58