Smith, R. Craig.
Preval : prefeasibility software program for evaluating mineral properties / R. Craig Smith. - Washington, D.C. : U.S. Dept. of the Interior, 1992. - 35 p. - Information circular / Bureau of mines, U.S. Dept. of the Interior ; 9307 . - Information circular (United States. 9307 .
91048033
PREVAL (Computer programme).
Mine valuation--Computer programmes.
Preval : prefeasibility software program for evaluating mineral properties / R. Craig Smith. - Washington, D.C. : U.S. Dept. of the Interior, 1992. - 35 p. - Information circular / Bureau of mines, U.S. Dept. of the Interior ; 9307 . - Information circular (United States. 9307 .
91048033
PREVAL (Computer programme).
Mine valuation--Computer programmes.