Hawley, Amos Henry. Human ecology : a theoretical essay / Amos H. Hawley. - Chicago : University of Chicago Press, c1986. - viii, 168 p. : ill. ; 22 cm. - A Chicago original paperback . Includes index. Bibliography: p. 141-160. ISBN: 0226319830 : $21.00 0226319849 (pbk.) : $10.00 LCCN: 86007077 Subjects--Topical Terms: Human ecology. LC Class. No.: GF21 / .H38 1986 Dewey Class. No.: 304.2