Cushaman, Joseph A. <br/><br/>
The American species of Orthophragmina and Lepidocyclina. 

 - Washington  Government Printing Office  1920 
 - pp. 39-108 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA