Douglass, Raymond C. <br/><br/>
The foraminiferal genus Orbitolina in North America;  a study of the genus Orbitolina, its type species, morphology, and stratigraphic and geographic distribution in North America. 

 - Washington.  U.S. Govt. Print. Off.,  1960. 
 - 52 p.  illus., maps, diagrs. (3 fold. in pocket), tables.  29 cm. 
<br/><br/>Bibliography: p. 45-50. 
<br/><br/><label>LCCN: </label>gs 60000206  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Orbitolina<br/>Foraminifera, Fossil--North America<br/>Paleontology--Cretaceous
<br/><br/><label>LC Class. No.: </label>QE75  / .P9 no. 333 
<br/><br/><label>Dewey Class. No.: </label>563.1 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.16:333