Smith, R. Craig. <br/><br/>
PREVAL :  prefeasibility software program for evaluating mineral properties : version 1.01, users manual, using Lotus 1-2-3 release 2.01 or newer / 
by R. Craig Smith. 
 - [Washington, D.C.] :  U.S. Dept. of the Interior, Bureau of Mines,  1992. 
 - 35 p. :  ill. ;  28 cm. 
 - Information circular ;  9307 .
 - Information circular (United States. Bureau of Mines) ;  9307. .
<br/><br/>Includes bibliographical references (p. 22). 
<br/><br/><label>LCCN: </label>91048033  
<br/><br/><label>Subjects--Uniform Titles: </label><br/>PREVAL.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mine valuation--Computer programs.
<br/><br/><label>LC Class. No.: </label>TN295  TN272  / .U4 no. 9307 
<br/><br/><label>Dewey Class. No.: </label>622 s  338.2/3 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.27:9307