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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 C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331. |
| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
| USGS Open File report 2010-5220 |
| Am Min 72:1122-1130 |
| Elliott, Brent A. (2018) "Petrogenesis of Heavy Rare Earth Element Enriched Rhyolite: Source and Magmatic Evolution of the Round Top Laccolith, Trans-Pecos, Texas" Minerals 8, no. 10: 423. https://doi.org/10.3390/min8100423 O'Neill, L. C. (2014). REE-Be-UF mineralization of the Round Top laccolith, Sierra Blanca Peaks, Trans-Pecos Texas (MS dissertation). Am Min 72:1122-1130 |