Drooger, Cornelis Willem, <br/><br/>
Smaller radiate nummulites of Northwestern Europe 
by C. W. Drooger, P. Marks and A. Papp. 
 - Langbroek  Schotanus and Jens  1971. 
 - 137 pages :   ill. ;   25 cm. 
<br/><br/>includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nummulites