The species concept in palaeontology :  a symposium / 
edited for the association by P. C. Sylvester-Bradley 
 - London :  The Systematics Association,  1956 
 - vi, 145 p. :  ill. ;  22 cm. 
 - The systematic association Publication ;  no. 2 .
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label> creative press 12s.6d 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleontology<br/>Species
<br/><br/><label>Dewey Class. No.: </label>560