Little, Elbert L. Trees of Puerto Rico and the Virgin Islands / Elbert L. Little, Roy O. Woodbury & Frank H. Wadsworth - Washington : USDA , 1974 - 2 vols. ill. ; 26 cm. - USDA agriculture handbook vol. 2 . Includes bibliographical references and index. Subjects--Topical Terms: Tree plantationPuerto Rico Dewey Class. No.: 634.956 / LIT