Gradstein, F. M. <br/><br/>
Mediterranean Pliocene Globorotalia  a biometrical approach 
F. M. Gradstein 
 - Odijk :  s.n.,  1974 
 - 127 p. :  ill. ;  25 cm. 
<br/><br/>p. 103-105. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Globorotalia, Fossil.<br/>Paleontology--Pliocene.<br/>Paleontology--Mediterranean region.