European coal geology and technology by Gayer, Rodney A., Pešek, Jiří fromGeological Society special publication 0 Type: Book
European coal geology and technology by Gayer, Rodney A., Pešek, Jiří fromGeological Society special publication 0 Type: Book
Geology of fossil fuels: Beijing, China, 4-14 August 1996 by International Geological Congress., 30, 1996, Beijing, Yang, Qi fromProceedings of the 30th International Geological Congress 0 Type: Book
