Singer, D. A. <br/><br/>
Grade and tonnage relationships among copper deposits / 
by D. A. Singer, Dennis P. Cox, and Lawrence J. Drew, and Geochemical exploration techniques applicable in the search for copper deposits / by Maurice A. Chaffee 
 - Washington :  United States Government Printing Office,  1975 
 - 47 p. in various pagings :  ill. ;  29 cm. 
 - Geology and resources of copper deposits .
 - Geological Survey professional paper ;  907-A, 907-B .
<br/><br/>Includes bibliographie 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Copper ores--United States<br/>Copper--Analysis<br/>Geochemical prospecting
<br/><br/><label>Dewey Class. No.: </label>553.430973