|
USA | |
| Rocks & Min 70:5 pp 320-333 |
| Cook, Robert B., Smith, W. Everett (1982) Mineralogy of Alabama. Bulletin 120. Geological Survey of Alabama |
| Cook, Robert B., Smith, W. Everett (1982) Mineralogy of Alabama. Bulletin 120. Geological Survey of Alabama |
| Canadian Mineralogist Vol. 27, pp. 93-105 (1989) Rocks & Min 70:5 pp 320-333 |
| Cook, Robert B., Smith, W. Everett (1982) Mineralogy of Alabama. Bulletin 120. Geological Survey of Alabama |