Larsen, Esper S.  1879-1961. <br/><br/>
Geology and petrology of the San Juan region, southwestern Colorado, 
by Esper S. Larsen, Jr., and Whitman Cross. 
 - Washington,  U.S. Govt. Print. Off.,  1956. 
 - xiv, 303 p.  illus., maps (3 col.) diagrs. (1 col.) tables.  29 cm. 
<br/><br/> Part of illustrative matter folded in pocket. 
<br/><br/>Selected bibliography : p. 297-299. 
<br/><br/><label>LCCN: </label>gs 56000138  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Colorado.<br/>Petrology--Colorado.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>San Juan Mountains (Colo. and N.M.)
<br/><br/><label>LC Class. No.: </label>QE75  / .P9 no. 258 
<br/><br/><label>Dewey Class. No.: </label>557.88