Gypsum from North Korea
North Korea | |
| Suzuki, A. (1943) Jour. Min. Soc. Korea, v 12. |
| experts.about.com/e/y/yo/Yodok_concentration_camp.htm |
North Korea | |
| Suzuki, A. (1943) Jour. Min. Soc. Korea, v 12. |
| experts.about.com/e/y/yo/Yodok_concentration_camp.htm |