Bureau of Mines / Minerals yearbook metals and minerals (except fuels) 1958
Year 1958, Volume I (1959)
de Polo, Taber; Tucker, Gertrude E.
Kyanite and related minerals, pp. 631-634
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