Bureau of Mines / Minerals yearbook: Area reports: international 1971
Year 1971, Volume 3 (1971)
Drake, Harold J.
Republic of Korea, pp. 523-531 ff. PDF (855.5 KB)
http://rightsstatements.org/vocab/NoC-US/1.0/| As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright