Wahl, Siegfried von. <br/><br/>
Investment appraisal and economic evaluation of mining enterprise /  
by Siegfried von Wahl. 
 - 1st.Edn. /  
 - Clausthal-Zellerfeld :   Trans Tech Publications ,   1979 
 - x,249p :  
<br/><br/><label>ISBN: </label>0-87849-048-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth Science
<br/><br/><label>Dewey Class. No.: </label>HX:(X65)  / M3