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	1.	No cover image available Geochemistry and tectonic setting of pre-collision Cretaceous and Paleogene volcanic rocks of Ecuador by Lebras, M Mégard, François Dupuy, C Dostal, J Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 99(4), 1987, p. 569-578: : ill., carte, graph., tab., rés.(Angl) Availability: No items available.
	2.	No cover image available Rare earth element distribution in plio-quaternary volcanic rocks from southern Peru by Dostal, J Dupuy, Claude Lefevre, Christian Material type: Article; Format: print Language: En Lithos 10, 1977, p. 173-183: : graph., tab. Availability: Items available for loan: Biblioteca IFEA (1)Call number: Am.GeolD-21. Place hold

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