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	1.	No cover image available Petrography of the Paradise (N° 12), Baker (N°13) and Coiltown (N° 14) coals of the lower portiion of the Sturgis formation (Pennsylvanian) in western Kentucky by Trinkle, Eric Hower, James Wild, Garry Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 94(12), 1983, p. 1466-1474: : cartes, tab., rés.(Angl) Availability: No items available.
	2.	No cover image available Coal metamorphism in the upper portion of the Pennsylvanian Sturgis formation in western Kentucky by Hower, James Fiene, Faith Wild, Garry Helfrich, Charles Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 94(12), 1983, p. 1475-1481: : ill., graph., tab., rés.(Angl) Availability: No items available.

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