Colorado Coal Analyses, 1975 (analyses of 64 Samples Collected in 1975) Colorado Geological Survey Published: 1977 Total Pages: 130 Get eBook
Analyses of Coal Samples Collected 1975-1977 James A. Henderson (Jr.) Published: 1981 Total Pages: 152 Get eBook
Proceedings of the Second Symposium on the Geology of Rocky Mountain Coal, 1977 Helen E. Hodgson Published: 1978 Total Pages: 242 Get eBook
Collection, Chemical Analysis, and Evaluation of Coal Samples in 1975 Published: 1976 Total Pages: 503 Get eBook
Special Publication - Colorado Geological Survey Colorado Geological Survey Published: 1969 Total Pages: 758 Get eBook
