Eckholm, Erik P. Down to earth : environment and human needs / Erik P. Eckholm ; International Institute for Environment and Development. - 1st ed. - New York : Norton, c1982. - xv, 238 p. ; Includes bibliographical references and index. ISBN: 0393016005 0393300404 (pbk.) Subjects--Topical Terms: Human ecology.Environmental protection. Dewey Class. No.: 344.046 / ECK.D