Little, Elbert L., Jr. Checklist of United States trees : native and naturalized - 2 ed. - Washington : Department of Agriculture, 1979 - 375 p. - Agriculture handbook ; 541 . - Agriculture handbook ; 541 . LCCN: 30979 Subjects--Topical Terms: Árboles--E.U.A. Dewey Class. No.: 634.97 / L58 1979