Howell, Arthur H.  1872-1940 <br/><br/>
Revision of the north american ground squirrels / 
by Arthur H. Howell. 
 -- Washington :   United States, Departement of  agriculture,   1938 
 - 256p., 32h. de lám. -- 
 (North American Fauna  ; 56).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roedores
<br/><br/><label>Universal Decimal Class. No.: </label>599.32