Wellmer, Friedrich-Wilhelm <br/><br/>
Economic evaluations in exploration / 
Friedrich-Wilhelm Wellmer. 
 - Berlin :  Springer-Verlag,  1986. 
<br/><br/><label>ISBN: </label>3540509240 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Economic
<br/><br/><label>LC Class. No.: </label>TN260  / Wel 1989