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USA | |
| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
| [var. Bravoite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| [var. Bravoite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Selly,T., Huntley, J.W., Shelton, K.L., Schiffbauer, J.D. (2016) Ichnofossil record of selective predation by Cambrian trilobites. Palaeogeography, Palaeoclimatology, Palaeoecology 444, 28-38. |
| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
| Kevin Shelton collection |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |