Pratt, Joseph Hyde,  1870-1942. <br/><br/>
Corundum and its occurence and distribution in the United States (a rev. and enl. ed. of bulletin no. 180) by Joseph Hyde Pratt. 

 - Washington,  Gov't print. off.,  1906. 
 - 175, iii p.  illus., xviii pl. (incl fold. maps) diagrs.  24 cm. 
 - U.S. Geological Survey. Bulletin  no. 269 .
 - U.S. Geological Survey bulletin ;  269 .
<br/><br/> Issued also as House doc. no. 202, 59th Cong., 1st sess. 
<br/><br/><label>LCCN: </label>gs 06000395  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Corundum.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 269