U.S. surveys. Colorado Comments on various surveys. R.M.News.Aug.9,1871 p.2 c.1 Plans for agricultural and statistical survey. R.M.News.Dec.12,1871 p.2 c.2 Professor Hayden.'s survey of Rocky mountains .1873. R.M News.Jan.8,1874 p.2 c.2 F.F.Brune report placer mining claims, Northwestern Colorado . R.M.News.Jan.21,1874 p.2 c.2 Doctor F.V. Hayden asks appropriation to continue work. R.M.News.Jan.30,1874 p.4 c.1
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