| [var. Specularite] Murdoch, Joseph, Webb, Robert W. (1966) Minerals of California, Centennial Volume (1866-1966) - California Division Mines and Geology, Bulletin 189. p.1-559. Strong, Mary Frances Berkholz (1963), A high Sierra field trip: Gems & Minerals, No. 309: 22-24, June, 1963: 23 Trask, Parker Davies, Ivan F. Wilson & F.S. Simons (1943), Manganese deposits of California – a summary report: California Division Mines Bulletin 125: 79 |