Bureau of Mines / Minerals yearbook metals, minerals, and fuels 1968
Year 1967, Volume I-II (1969)
Sweeney, John W.
Kyanite and related minerals, pp. 627-630 PDF (437.9 KB)
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