LA POLITIQUE CHARBONNIERE DES ETATS-UNIS. = COAL POLICY OF THE UNITED STATESPERRY H.1976; ANN. MINES; FR.; DA. 1976; VOL. 182; NO 1; PP. 64-71; ABS. RUSSE ANGL. ALL. ESPArticle

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ESSAI DE SYNTHESEROUX M; MORF JJ.1974; IN: ESPOIRS LIMITES SOURCES ENERG. NON CONVENTIONNELLES. JOURN. INF.; LAUSANNE; 1974; ZUERICH; ASSOC. SUISSE ELECTR.; DA. 1974; PP. (12 P.)Conference Paper

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