Quartz from North Hamgyong Province, North Korea
North Korea | |
| Tsuda, H. (1969) Supplement to "Minerals of Korea" (in: Geology and Mineral Resources of the Far East, vol. 2 (Tokyo University Press)) |
| Hideo Tsuda (1969) Supplement to "Minerals of Korea". |
| Takubo, J. and Saito, M.: "Allanite in Korea". (in: Geology and Mineral Resources of the Far East, University of Tokyo Press, 1969 pp 176-181) |
| Field collected around the time of WW2 by Otokichi Nagashima (after whom nagashimalite was named). |
| Takubo, J. and Saito, M. (1969) Allanite in Korea. (in: Geology and Mineral Resources of the Far East, vol. 2 University of Tokyo Press) |
| Sudo, T. (1944) Journ. Geological Society of Japan, 51, 606. |
