Cartwright, O. L. <br/><br/>
Scarabaeid Beetles of the Genus Bradycinetulus and Closely Related Genera in the United States 

 - Washington :   Smithsonian Institution,   1953. 
 - 95 p. ;   18 cm. 
 - Proccedings of the United States National Museum ;   v.103, nš 3318 .