The species concept in palaeontology  a symposium 
edited for the association by P. C. Sylvester- Bradley 
 - London  The Systematic Association  1956 
 - vi, 145 p.  ill., maps  22 cm 
 - Systematic Association  Publication  no.2 .
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleontology<br/>Species