F.-W. Wellmer Economic Evaluations in Exploration. Berlin, Heidelberg and New York (Springer-Verlag), 1989. xiv + 163 pp. Price DM 38.00

A. E. Annels
1990 Mineralogical magazine  
doi:10.1180/minmag.1990.054.375.21 fatcat:5rwcv6sy6fhj3h6uwevvs6m4cm