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Report of the Commission on Inquiry Into the Coal Resources of the Republic of South Africa
South Africa. Commission of Inquiry into the Coal Resources of the Republic of South AfricaSouth Africa. Department of Mines
出版Republic of South Africa, Department of Mines : obtainable from the Government Printer, 1975
ISBN06210243929780621024395
URLhttp://books.google.com.hk/books?id=djoOAQAAIAAJ&hl=&source=gbs_api