Rutile from Alxa League (Alashan Prefecture), Inner Mongolia, China
China | |
| Xuehui Xia, Jiazhong Yuan, Yuhai Zhao, and Fei Yan (2003): Geology of Chemical Minerals 25(4), 129-144 |
| [var. Niobium-bearing Rutile] Orris, Greta J., Grauch, Richard I. (2002) Rare Earth Element Mines, Deposits, and Occurrences. Open-File Report 2002-189. US Geological Survey doi:10.3133/ofr02189 |