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South Dakota mica deposits
J.W. Adams, L.C. Pray, L. R. Page, J.J. Morton, M.P. Erickson, T. A. Steven, K.F. Stopper
1945, Open-File Report 45-87
The 21 and 27 fluorspar mines, Zuni Mountains, Valencia County, New Mexico
E. N. Goddard
1945, Open-File Report 45-3
The 21 and 27 mines, near the southeastern end of the Zuni Mountains and about 14 miles southwest of Grants, Valencia County, N. Mex., are in one of the most productive fluorspar areas in the West. They were named after sections 21 and 27, respectively, of T. 9 N., R....