Peterson, Jocelyn A. <br/><br/>
Platinum-group elements in sedimentary environments in the conterminous United States / 
by Jocelyn A. Peterson ; with a section on platinum-group elements in coal by Robert B. Finkelman and Susan J. Tewalt. 
 - Denver :  U.S. Geological Survey,  1994 
 - 1 v. (various pagings) :  ill. ;  27 cm. 
 - U.S. Geological Survey bulletin;  2049 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Platinum ores--United States<br/>Placer deposit--United States<br/>Sedimentary basins--United States