Bureau of Mines / Minerals yearbook metals and minerals (except fuels) 1955
Year 1955, Volume I (1958)
Otis, L. M.; Marks, Annie L.
Diatomite, pp. 437-440
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