Haffty, Joseph,  1922- <br/><br/>
A manual on fire assaying and determination of the noble metals in geological materials / 
by Joseph Haffty, L. B. Riley, and W. D. Goss 
 - Washington, D.C :  United States Government Printing Office,  1977 
 - v, 58 p. :  ill. ;  24 cm. 
 - Geological Survey bulletin ;  1445 .
<br/><br/>Bibliography: p. 56-58 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gold--Analysis<br/>Silver--Analysis<br/>Platinum group--Analysis
<br/><br/><label>Dewey Class. No.: </label>669.962