Cannon, W. F. <br/><br/>
Computer-aided estimates of concentrating-grade iron resources in the Negaunee Iron-formation, Marquette District, Michigan / 
by W. F. Cannon, Sandra L. Powers, and Nancy A. Wright 
 - Washington :  U.S. Govt. Print. Off.,  1978 
 - iii, 21 p. :  ill. ;  29 cm. 
 - Geological Survey professional paper ;  1045 .
<br/><br/>Bibliography: p. 21 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Iron ores--Data processing--Michigan--Marquette Co.
<br/><br/><label>Dewey Class. No.: </label>553.40977496