Pyrite from South Hamgyong Province, North Korea
North Korea | |
| Nakamura, K. (1943) Journal of the Geographical Society, Tokyo, 55, 652. |
| Takeo Kato: "Two Types of Nickeliferous Pyrrhotite Deposits Found in Korea." (9 pp) |
| watanabe, T. : Boron mineral resources in Korea (in: Geology and Mineral Resources of the Far East, University of Tokyo Press, 1969) |