The ecosphere : by C. Leland Rodgers and Rex E. Kerstetter. organisms, habitats, and disturbances / Rodgers, C. Leland (Charles Leland), 1918- Kerstetter, Rex E. Ecology. Nature Effect of human beings on. Ecological disturbances. QH541 .R63 574.5 ROE Includes Index. Includes bibliographies. New York : Harper & Row, c1974. c1974. 1974 Text viii, 341 p. : eng