Loeblich, Alfred R. <br/><br/>
Morphology and Taxonomy of the Foraminiferal Genus Pararotalia le Calvez, 1949 

 - Washington :   Smithsonian Institution,   1957. 
 - 24 p. :   il. ;   21 cm. 
 - Smithsonian Miscellaneous Colections ;   4302 .