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USA | |
| Buchholz, T.W., A.U. Falster & W.B. Simmons (2014), Accessory Mineralogy of an Evolved Dickinson County, Michigan, Pegmatite, a presentation before the 41st. Rochester Mineralogical Symposium, April 25, 2014. |
| [var. Manganese-bearing Fluorapatite] Rocks & Min. (2002) 77:170 |
| Falster, A. , W.B. Simmons & P.B. Moore (1996) The mineralogy and geochemistry of the Animikie Red Ace pegmatite in Florence County, Wisconsin: Recent Research Developments in Mineralogy: 1: 7-67. |
| Richardson, P., A.U. Falster & W. B. Simmons (1996) A new locality for nigerite in Florence County, Wisconsin: Mineral News: July, 1996, page 4. |