kw.\*:("PERIODE 1958-1982")
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UN EXEMPLE DE RECONVERSION AU CHARBON: L'INDUSTRIE CIMENTIERE = AN EXAMPLE OF RECONVERSION TO COAL: THE CEMENT INDUSTRYDENOIX G.1981; ANN. MINES; ISSN 0003-4282; FRA; DA. 1981; VOL. 187; NO 5-6; PP. 43-50; ABS. ENG/GER/SPA/RUSArticle
25 YAHRE, BERGBAU - FORSCHUNG GMBH = ANS, BERGBAU-FORSCHUNG-GMBH1983; ; DEU; ESSEN: BERGBAU-FORSCHUNG GMBH; DA. 1983; 88 P.Miscellaneous