Opal from Kyzylkum Desert, Central Asia
Uzbekistan | |
| Pechenkin, V.G., and Pechenkin, I.G. (2005): Lithology and Mineral Resources 40(5), 462-471. |
| Solodov, I.N., Nesterova, M.V., Shugina, G.A., Ganina, N.I., Shulik, L.S., and Solodov, D.I. (2001): Lithology and Mineral Resources 36(1), 43-62. |
Dahlkamp, Franz J. (2009) Uranium Deposits of the World - Asia. Springer Berlin Heidelberg. doi:10.1007/978-3-540-78558-3 |