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	1.	No cover image available Coal resources and reserves estimates : some unresolved problems by Palmer, James 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. 519 Availability: No items available.
	2.	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.
	3.	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.
	4.	No cover image available A critical evaluation of published western coal-resource estimates by Glass, Gary 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. 538-541: : graph., tab. Availability: No items available.
	5.	No cover image available New maps of Federal coal by Wayland, Russell 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. 542-550: : ill., tab., rés.(Angl) Availability: No items available.
	6.	No cover image available Geologic problems associated with coal resources and reserves determination in the Appalachian Coal Basin by Brant, Russell 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. 551-557: : carte, rés.(Angl) Availability: No items available.
	7.	No cover image available Effects of physical characteristics of coal occurrence and current mining methods on economic recoverability by Weir, John Mcnulty, James 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. 558-562: : tab., rés.(Angl) Availability: No items available.
	8.	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.
	9.	No cover image available Desirable characteristics of a state-wide evaluation of coal resources by Treworgy, C. G Damberger, H. H Palmer, J. E 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. 574-577: : ill., rés.(Angl) Availability: No items available.

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