1. Mineralogy and rare earth element geochemistry of apatite and xenotime from the Gloserheia granite pegmatite, Froland, Southern Norway;Åmli;Amer. Mineral.,1975
2. Solar system abundances of the elements;Anders;Geochim. Cosmochim. Acta,1982
3. Replacement and primary magmatic carbonatites from the Wet Mountains area, Fremont, and Custer Counties, Colorado;Armbrustmacher;Econ. Geol.,1979
4. Compositional and phase relationships among rare earth element minerals;Burt,1989
5. The crystallography of bastnäesite, parisite, roentgenite, and synchysite;Donnay;Amer. Mineral.,1953