|
USA | |
| 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 |
| Chakhmouradian, A. R., Mitchell, R. H. (1999) Primary, agpaitic and deuteric stages in the evolution of accessory Sr, REE, Ba and Nb-mineralization in nepheline-syenite pegmatites at Pegmatite Peak, Bearpaw Mts, Montana. Mineralogy and Petrology, 67 (1) 85-110 doi:10.1007/bf01165118 |
| 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. |