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
Omfang	VII, 179 s., 8 pl., : 14 kart i lomme, ill.