USGS research on mineral reources - 1994 part B - guidebook for field trips /  edited by Charles H. Thorman and Diane E. Lane 

 - Washington :  U.S. Government Printing Office,  1994 
 - 115 p. :  ill. ;  27 cm. 
 - U.S. Geological Survey circular ;  1103B .
<br/><br/> Ninth V.E. McKelvey forum on mineral and energy resources, cosponsored by Arizona Geological Society, University of Arizona and Arizona Geological Survey