Cushman, Joseph A. <br/><br/>
Foraminifera :  their classification and economic use / 
by Joseph A. Cushman. 
 - 4th rev. and enlarged ed. 
 - Cambridge, Massachusetts :  Harvard University Press,  c1948. 
 - viii, 605 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0674308018 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Foraminifera, Fossil.<br/>Foraminifera--Bibliography.