Context

Context of Reconnaissance geology, geophysics, and geochemistry of the southeastern part of the Lewis and Clark Range, Montana : a study identifying a weak lead-zinc mineralized belt, 30 miles long, that is stratigraphically and structurally controlled, by Melville R. Mudge, Ralph L. Erickson, and Dean Kleinkopf ; with spectrographic data by G.C. Curtin and A.P. Marranzino ; and a section on Isotopic composition of lead by R.E. Zartman
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