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	1.	No cover image available Historical review of and current progress in coal-resource estimation in the United States by Wood, Gordon Jr Coal geology symposium: The evaluation of North American coal resources ( Nov. 1979) Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 92(8), part I, 1981, p. 520-528: : carte, graph., rés.(Angl) Availability: No items available.
	2.	No cover image available Canadian coal-resource terminology and evaluation methodology by Irvine, John Coal geology symposium: The evaluation of North American coal resources ( Nov. 1979) Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 92(8), part I, 1981, p. 529-537: : carte, graph., tab., rés.(Angl) Availability: No items available.
	3.	No cover image available The national coal resources data system : a status report by Devereux Carter, M Medlin, Antoinette Krohn, Kathleen Coal geology symposium: The evaluation of North American coal resources ( Nov. 1979) Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 92(8), part I, 1981, p. 563-573 : carte, graph., tab., rés.(Angl) Availability: No items available.
	4.	No cover image available Paleogeographic controls of coal accumulation, Cretaceous Blackhawk formation and Star Point Sandstone, Wasatch Plateau, Utah by Flores, Romeo Blanchard, Louis Sanchez, David Marley, Walter Muldoon, William Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 95(5), 1984, p. 540-550: : ill., carte, rés.(Angl) Availability: No items available.

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