|
| Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
Embrey, Peter G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, 42 (322) 169-177 doi:10.1180/minmag.1978.042.322.01
Clark, A. M., Easton, A. J. and Mount, M. (1978) A Study of the Neotocite Group. Mineralogical Magazine, vol. 42, n° 322, 279-M30.
Collins, J.H. (1879) IV.—Additional Note on Penwithite. Mineralogical Magazine, vol. 3, n° 13, 89-90.
Collins, J.H. (1878) IX.—Preliminary Note on Penwithite, a New Cornish Mineral. Mineralogical Magazine, vol. 2, n° 9, 91. |
