1900. 2016-12-14T20:31:34Z. 2017-05-30T21:06:10Z. Sanborn-Perris Map Co. Sanborn-Perris Map Co. English. cartographic image. Public. Colorado, Georgetown, Georgetown (Colo.), Silver Plume, Silver Plume (Colo.), Georgetown., and Silver Plume.
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1900. 2016-12-16T15:32:12Z. 2017-05-30T21:06:11Z. Sanborn-Perris Map Co. Sanborn-Perris Map Co. English. cartographic image. Public. Colorado, Idaho Springs, Idaho Springs (Colo.), and Idaho Springs.
1900. 2018-07-31T16:56:56Z. 2018-09-05T19:26:49Z. Sanborn-Perris Map Co., cartographer, publisher. Sanborn-Perris Map Co., Ltd. CtY-BR. English. cartographic image. Public. Colorado, Central City, Black Hawk, Nevadaville, Russell Gulch, Central City (Colo.), Black Hawk (Colo.), Nevadaville (Colo.), Russell Gulch (Colo.), Black Hawk., Central City., Nevadaville., and Russell Gulch.
1900. 2021-05-04T17:00:07Z. 2021-05-07T21:33:49Z. Waggener, T.L., (cartographer). publisher not identified. English. cartographic image. Public. Colorado, Pikes Peak (Colo.), and Front Range (Colo. and Wyo.).
1900. 2013-03-13T17:52:45Z. 2021-04-06T13:06:20Z. Hills, R. C. (Richard Charles), 1848-1923. U.S. Geological Survey. English. Public. Colorado and Huerfano County.
