Mansfield, George Rogers,  1875-1947. <br/><br/>
Nitrate deposits of the United States, 
by G.R. Mansfield and Leona Boardman. 
 - Washington,  U.S. Govt. Print. Off.,  1932. 
 - vi, 107 p.  incl. illus., maps, tables, profiles, 11 pl. (part fold., incl. maps)  23 cm. 
 - U.S. Geological survey. Bulletin 838 .
<br/><br/> At head of title: United States Department of the Interior. Ray Lyman Wilbur, secretary, Geological survey. W.C. Mendenhall director.  One folded map in pocket.  "United States Geological survey publications on nitrate."- p. 101. 
<br/><br/>Bibliographical foot-notes. 
<br/><br/><label>LCCN: </label>gs 32000079  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrates.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 838