Oswald, James M. Planet Earth / James M. Oswald, June R. Chapin, Roger La Raus ; general editor, Lee F. Anderson. - Boston : Houghton Mifflin, c1976. - 352 p. : ill. - Windows on our world The Houghton Mifflin social studies program . ISBN: 0395201349 Subjects--Topical Terms: Physical geography.Geography. LC Class. No.: GB55 / .O87 Dewey Class. No.: 301.31