Species and speciation edited by/ 
Elisabeth S.Vrba 
 - Pretoria :  Transvaal Museum,  1985 
 - xviii,176 p.  ill. ;  29 cm. 
 - Transvaal museum monograph no.4 .
<br/><br/><label>ISBN: </label>0907990045(hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Species