United States surveys, colorado Survey of Duhlic lends, 1871 - 1872. R.M.News.Jan.1,1873 p.2 c.2 Discussion in Congress. R,M.News.Mar.1, 1877 p.2 c.2 Plans for Hayden's geological geographic survey. R,M. News. May 6,187? r.4 c.2 Discussion on appropriations. P.M.News.Msr.6,1877 p.2 c.2 First efforts to survey ruins, 1874-1875. Baker & Hafen. history .Colo. v.1 D.249
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