Hydroxyapophyllite-(K) from
USA | |
| American Mineralogist, Volume 63, pages 196-202, 1978 |
Betts, John (n.d.) John Betts website listing. | |
| Mineralogical Record 9:89-92 |
| Dunn, Pete J. (1995) Franklin and Sterling Hill, New Jersey: The world's most magnificent mineral deposits Vol. 4. The Franklin-Ogdensburg Mineralogical Society. |
Franklin Mine, Franklin, Sussex County, New Jersey, USA