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	1.	No cover image available El potencial aurífero del Ecuador by Barragán, Jorge Material type: Article; Format: print Language: Spa In: Minería ecuatoriana 1, 1988, p. 15 : carte Availability: No items available.
	2.	No cover image available Tobar Donoso, una realidad by Barragán, Jorge Material type: Article; Format: print Language: Spa In: Minería ecuatoriana 2, 1990, p. 47-49 : ill., carte Availability: No items available.
	3.	No cover image available Junín by Barragán, Jorge Material type: Article; Format: print Language: Spa In: Minería ecuatoriana 3, 1994, p. 33-35 : ill. Availability: No items available.
	4.	No cover image available Placeres auríferos en el Ecuador by Barragán, Jorge Ortiz, Carlos Merlyn, Michel Symposium international sur les gisements alluviaux d'or ( 1-5 juin 1991 : La Paz) Series: Colloques et séminaires Material type: Article; Format: print ; Literary form: Not fiction Language: Spa In: Gisements alluviaux d'or : actes du symposium international sur les gisements alluviaux d'or p. 23-27 : carte, tab., rés(Es, Fr) Availability: No items available.

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