ISBN 3540187499 books & textbook
International Mineral Economics: Mineral Exploration, Mine Valuation, Mineral Markets, International Mineral Policies
Gocht, Werner R. Zantop, Half Eggert, Roderick G.
Springer /1988-05-27 Paperback / 285 Pages
isbn-10: 3540187499 / isbn-13: 9783540187493
