Ecology out of joint : new environments and why they happen / Lorus J. Milne and Margery Milne. Milne, Lorus Johnson, 1912- Milne, Margery Joan Greene, 1914- joint author. Ecology. Animal introduction. Plant introduction. Wildlife conservation. QH541 .M523 574.5 MIE Includes bibliographical references and index. New York : Scribner, c1977. c1977. 1977 Text 304 p. : eng