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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 teh Appalachian basin; discussion and reply by Forsman, Nels Hostermann, John Roen, John Material type: Article; Format: print Language: Eng Other title: Misuse of the term "bentonite" for ash beds of Devonian age in teh Appalachian basin In: Geological Society of America bulletin 95(1), 1984, p. 124-125 Availability: No items available.
	3.	No cover image available Superposition d'unités varisques à séries hétéropiques du Dévonien supérieur dans la Nappe alpine de Gavarnie (Pyrénées centrales) by Majesté-Menjoulas, Claude Material type: Article; Format: print Language: Fre In: Bulletin de la Société géologique de France 23(6), série 7, 1981, p. 673-678: : ill., rés.(Fr., Angl) Availability: No items available.
	4.	No cover image available Le gisement de sulfures massifs polymétalliques de Neves-Corvo (Baixo Alentejo, Sud Portugal) by Albouy,L Conde, L. N Foglierini, F Leca, X Morikis, A Callier, L Carvalho, P Songy, J Material type: Article; Format: print Language: Fre In: Chronique de la recherche minière 460, 1981, p. 5-27 : ill., carte, tab., rés.(Fr., Angl., Spa., Ita) Availability: No items available.

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