ECONOMIC ASSESSMENT OF OCEAN MINING = ESTIMATION DES INVESTISSEMENTS DANS L'EXPLOITATION OCEANIQUEENZER H.1980; NATIONAL AND INTERNATIONAL MANAGEMENT OF MINERAL RESOURCES, JOINT MEETING OF THE INSTITUTION OF MINING AND METALLURGY, THE SOCIETY OF MINING ENGINEERS OF AIME AND THE METALLURGICAL SOCIETY OF AIME/1980/LONDON; GBR; LONDON: INST. MINING METALLURGY; DA. 1980; 12 P.; BIBL. 9 REF.; 11 TAB. ; ILL./TABL.Conference Paper

OCEAN MINING - AN ASSESSMENT OF CURRENT TECHNOLOGY AND ITS ECONOMICS = L'EXPLOITATION DU FOND DES OCEANS: UNE REVUE DE LA TECHNOLOGIE ET DE SON ECONOMIEENZER H.1979; WORLD MINING CONGRESS. 10/1979/ISTANBUL; TUR; ANKARA: MADEN TETK. ARAMA ENST.; DA. 1979; VOL. 4; 20 P.; BIBL. 5 REF.; 8 TAB. ; TABL./ILL.Conference Paper