Wellmer, Friedrich Wilhelm <br/><br/>
Economic evaluations in exploration 
Friedrich Wihelm Wellmer 
 - Berlin  Springer-Verlag  1987 
 - xiii 163 p. : ill. ;24 cm. 
<br/><br/>p. 126-127 
<br/><br/><label>ISBN: </label>3540509240 
<br/><br/><label>LCCN: </label>98-011350 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineral industries--Accounting