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.
16698403
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.