Bureau of Mines / Minerals yearbook: Minerals in the world economy 1989
Year 1989, Volume 3 (1989)
Kimbell, Charles L.; Zajac, William L.
Minerals in the world economy, pp. 1-52 PDF (8.7 MB)
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