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USA | |
| [var. Cuprogoslarite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. |
| [var. Ferro-Goslarite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. |
| www.brightok.net/~rockman/Images/OkIndex.htm. |
| Rocks & Min. vol. 72 (1997) Zeitner, 1956. Midwest Gem Trails Rocks & Min., March 1998. |