File:Triangulation, summit of Sultan Mountain. Wilson and Rhoda. San Juan County, Colorado. 1874.jpg
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![File:Triangulation, summit of Sultan Mountain. Wilson and Rhoda. San Juan County, Colorado. 1874.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Triangulation%2C_summit_of_Sultan_Mountain._Wilson_and_Rhoda._San_Juan_County%2C_Colorado._1874.jpg/800px-Triangulation%2C_summit_of_Sultan_Mountain._Wilson_and_Rhoda._San_Juan_County%2C_Colorado._1874.jpg?20220119042210)
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