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Letter of Inquiry by W.H. Duffy to Arizona Bureau of Mines Regarding Viability of Montizona Copper Holdings
G. M. Butler, Letter of Inquiry by W.H. Duffy to Arizona Bureau of Mines Regarding Viability of Montizona Copper Holdings. Arizona Memory Project, accessed 28/11/2023, https://azmemory.azlibrary.gov/nodes/view/120262