Geology and fluorspar deposits, Northgate district, Colorado Contributions to Economic Geology
Washington, D. C. U. S. G. P. O, 1960. First Edition. Paperback. Unmarked. Maps intact in back pocket. Local very mild bmping of cover edges. ; Book Description; Spine has no signs of creasing. Pages are clean and not marred by notes or folds. Covers are square with minor wear..... More


