| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 132. Averill, Charles V. (1936), Mineral resources of Modoc County: California Division Mines Report 32: 453 Stines, Norman S. (1910), Hoag district, Modoc County, California: Mining and Scientific Press: 100: 386 |