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	1.	Image from OpenLibrary	Chronology of late cretaceous igneous and hiydrothermal events at the golden sunlight gold-silver breccia pipe, southwestern Montana. by De Witt, Ed U.S. Geological Survey Series: Geological Survey Bulletin Material type: Text; Literary form: Availability: Items available for loan: Biblioteca Centro de Documentación Isabel González (1)Call number: 552.3 W980. Place hold Save to lists Add to cart (remove)
	2.	Image from OpenLibrary	Gold Placers of the historical fortymile River Region,Alaska. by Yeend, Warren U.S.Geological Survey Bulletin Series: Geological Survey Bulletin 2125 Material type: Text; Literary form: Availability: Items available for loan: Biblioteca Centro de Documentación Isabel González (1)Call number: 551.24 y874. Place hold Save to lists Add to cart (remove)

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