Nontronite from
USA | |
| Maertens, J. (2007) Collecting Minerals at Tilcon's Millington Quarry. The Tilcon Times, Summer:10. |
| Cummings, W. L., 2008, Personal communication |
| Frondel, Clifford (1972) The Minerals of Franklin and Sterling Hill - A Check List. Wiley Interscience. Dunn(1995):Pt4:486 |
| Jack Baum |
| New Mexico Bureau of Mines and Mineral Resources, Mineral Museum no. 14929. |
| ref.: "Mineralogy of Pennsylvania", by S. G. Gordon, p. 209, 1922, Special Publication No. 1 The Academy of Natural Sciences of Philadelphia |
Mountainville, Salisbury Township, Lehigh County, Pennsylvania, USA