Gregory, Herbert E.  1869-1952. <br/><br/>
The San Juan country ;  a geographic and geologic reconnaissance of southeastern Utah / 
by Herbert E. Gregory, with contributions by Malcolm R. Thorpe. 
 - Washington :  U.S. Govt. Print. Off.,  1938. 
 - 123 p. :  incl. ill., tables. 26 pl. (incl. fold. maps, fold. diagrs.) ;  29 cm. 
<br/><br/> At head of title : United States Department of the Interior ... Geological Survey. 
<br/><br/>Bibliographic footnotes. 
<br/><br/><label>LCCN: </label>gs 38000291  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Utah--San Juan County<br/>Physical geography--Utah--San Juan County
<br/><br/><label>LC Class. No.: </label>QE75  / .P9 no. 188 
<br/><br/><label>Dewey Class. No.: </label>(200)qP no. 188