Man and Earth's ecosystems : an introduction to the geography of human modification of the Earth / Charles F. Bennett, Jr. ; cartography by Vincent G. Mazzucchelli. Bennett, Charles F. Nature Effect of human beings on. Human ecology. GF75 .B46 1976 301.3 BEM Includes bibliographical references and index. New York : Wiley, c1975. c1975. 1976 Text x, 331 p. : eng