Gazin, C. Lewis <br/><br/>
The Lower Eocene Knight Formation of Western Wyoming and its Mammalian Faunas 

 - Washington, D.C :   Smithsonian Institution,   1952. 
 - 82 p. :   láms. ;   18 cm. 
 - Smithsonian Miscellaneous Colections ;   v.117, n.18 .