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| Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025 |
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| Ixer, R. A. F., Pattrick, R. A. D., & Stanley, C. J. (1997). Geology, mineralogy and genesis of gold mineralization at Calliachar-Urlar Burn, Scotland. 0371-7453, 106, B99-B108. |
| Day, Harry (1999) BMS Database, British Micromount Society. |