Gocht, Werner. International mineral economics : mineral exploration, mine valuation, mineral markets, international mineral policies / W.R. Gocht, H. Zantop, R.G. Eggert. - Berlin ; New York : Springer-Verlag, c1988. - xiv, 271 p. : ill. ; 25 cm. ISBN: 0387187499 (U.S.) LCCN: 91014076 Subjects--Topical Terms: Mineral industries. Dewey Class. No.: 338.2