Ashworth, Edwin Thomas,  1924 <br/><br/>
Foraminifera from the cretaceous of the central cordillera of Guatemala / 
Edwin Thomas Ashworth 
 - Ohio :  The Ohio State University,  1974 
 - ix, 118 p. :  ill. ;  22 cm. 
<br/><br/>Thesis (Ph. D.) - Ohio State University, 1974 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Foraminifera