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	1.	No cover image available Misuse of the term "bentonite" for ash beds of Devonian age in the Appalachian basin by Roen, John Hosterman, John Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 93(9), 1982, p. 921-925: : graph., tab., rés.(Angl) Availability: No items available.
	2.	No cover image available Misuse of the term "bentonite" for ash beds of Devonian age in the Appalachian basin : discussion and reply by Huff, Warren Roen, John Hosterman, John Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 94(5), 1983, p. 681-683 Availability: No items available.

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