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USA | |
| Gobla, Michael J. (2012) Montana Mineral Locality Index. Rocks & Minerals, 87 (3) 208-240 doi:10.1080/00357529.2012.676825 W. P. Nash, Lawrence M. Monson, (1987) "Shonkin Sag laccolith A differentiated alkaline intrusion, Highwood Mountains, Montana", Rocky Mountain Section of the Geological Society of America, Stanley S. Beus |
| Can Min 38:145-152 |
| (n.d.) |
| Simms, F.E. (1965) Hypabyssal alkaline bodies and structure of part of the northwestern Crazy Mountains, Montana. American Mineralogist: 50: 291-292. |
| Chakhmouradian, Anton R., Mitchell, Roger H. (2002) The mineralogy of Ba- and Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montana, USA): comparisons between potassic and sodic agpaitic pegmatites. Contributions to Mineralogy and Petrology, 143 (1) 93-114 doi:10.1007/s00410-001-0333-6 Mitchell, Roger H. (2000) The mineralogy of nepheline-syenite pegmatites and associated alkaline rocks from Gordon Butte, Crazy Mountains (Montana) CSEG Symposium, Canadian Society of Exploration Geophysicists. |
| Gobla, Michael J. (2012) Montana Mineral Locality Index. Rocks & Minerals, 87 (3) 208-240 doi:10.1080/00357529.2012.676825 |