Minerals Handbook, 1990-91 Statistics and Analyses of the World's Minerals Industry
Minerals Handbook 1986 - 87 ; Statistics and Analyses of the World′s Minerals Industry
Minerals Handbook 1992/1993 Statistics and Analyses of the World's Minerals Industry
Minerals Handbook 1994-95 Statistics and Analyses of the World's Minerals Industry
Major Chemical and Petrochemical Companies of Europe 1989/90
Comecon Data 1981
Minerals Handbook 1988-89 Statistics and Analyses of the World's Minerals Industry
Minerals Handbook 1996-7 Statistics and Analyses of the World's Minerals Industry
Major Companies of Europe 1990/91 Volume 3 Major Companies of Western Europe Outside the European Economic Community
Afrika Jahrbuch 1990 Politik, Wirtschaft und Gesellschaft in Afrika südlich der Sahara
