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Hofmann, Beda; Helfer, M.; Diamond, Larryn William; Villa, Igor Maria; Frei, R.; Eikenberg, J. (2004). Topography-driven hydrothermal breccia mineralization of Pliocene age at Grimsel Pass, Aar massif, Central Swiss Alps. Schweizerische Mineralogische und Petrographische Mitteilungen, 84, pp. 271-302. Stäubli
