Emry, Robert J. <br/><br/>
Descriptive and comparative osteology of the oldest fossil squirrel Protosciurus (Sciuridae: Rodentia) / 
Robert J. Emry and Richard W. Thorington, Jr. 
 - City of Washington :  Smithsonian Institution Press,  1982. 
 - Smithsonian contributions to paleobiology ;  no. 47 .
<br/><br/>Bibliography: p. 35. 
<br/><br/><label>LCCN: </label>81014440 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Protosciurus.
<br/><br/><label>LC Class. No.: </label>QE701  QE882.R6  / .S56 no. 47 
<br/><br/><label>Dewey Class. No.: </label>560 s  569/.323