1. Colorado, Central City special map [cartographic material] / U.S. Geological Survey ; E.M. Douglas Creator: Geological Survey (U.S.) Published / Created: 1906 Call Number: BrSides Folio 2019 61 Image Count: 1 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Colorado, Central City special map [cartographic material] / U.S. Geological Survey ; E.M. Douglas, geographer ; Frank Tweedy, in charge of section ; topography by Pearson Chapman and D.F. Moor ; triangulation by Frank Tweedy.