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USA | |
| Aldrich,L.T.,Davis,G.L.,and James,H.L.,(1965) Age of Minerals From Metamorphic and Igneous Rocks Near Iron Mountain,Michigan Journal of Petrology,v.6,p.445-472 |
| Aldrich,L.T.,Davis,G.L.,and James,H.L.,(1965) Ages of Minerals From Metamorphic and Igneous Rocks Near Iron Mountain,Michigan:Journal of Petrology,v.6,p.445-472 |
| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf. |
| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| Chaudhuri,S.,and Faure,G.,(1967) Geochronology of the Keweenawan Rocks,White Pine,Michigan:Economic Geology,v.62,p.1011-1033 |