Geology and ore deposits of the La Plata district, Colorado
by Edwin B. Eckel ; with sections by J.S. Williams, F.W. Galbraith ... [et al.] ; Prepared in cooperaton with the Colorado State Geological Survey Board and the Colorado Metal Mining Fund
Bok Engelsk 1949
Utgitt | Washington , 1949
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Omfang | VII, 179 s., 8 pl., : 14 kart i lomme, ill.
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