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USA | |
| V.C. Fryklund and D.F. Holbrook (1950) Titanium Ore Deposit of Hot Spring County Arkansas, Bulletin 16 Arkansas Geological Survey |
| Kelly Nash specimen |
| Blade, Lawrence Vernon (1963) Geochemistry and petrology of the alkalic igneous complex at Magnet Cove, Arkansas. USGS Prof. Paper 425 Erickson, Ralph Leroy |
| V.C. Fryklund and D.F. Holbrook (1950) Titanium Ore Deposit of Hot Spring County Arkansas, Bulletin 16 Arkansas Geological Survey |
| V.C. Fryklund and D.F. Holbrook (1950) Titanium Ore Deposit of Hot Spring County Arkansas, Bulletin 16 Arkansas Geological Survey |
| V.C. Fryklund and D.F. Holbrook (1950) Titanium Ore Deposit of Hot Spring County Arkansas, Bulletin 16 Arkansas Geological Survey |
| Dummett, H. T. (1987). Geology and petrography of the Twin Knobs# 1 lamproite, Pike County, Arkansas. Mantle Metasomatism and Alkaline Magmatism, 215, 205. |