Postuma, J. A. <br/><br/>
Manual of planktonic foraminifera 

 - Amsterdam  Elsevier Publishing Company  1971 
 - vi,420p.  31cm. 
<br/><br/><label>ISBN: </label>0-444-40909-2 
<br/><br/><label>LC Class. No.: </label>QE772.P64