Wilkins, John S Defining species : a sourcebook from antiquity to today John S. Wilkins - Bern Peter Lang 2009 - xiv, 224 p. ; 23 cm Includes bibliographical references and index ISBN: 9781433102165 ISSN: 2008027030 Subjects--Topical Terms: Species - Philosophy Dewey Class. No.: 578.012 WIL