Leadville mining district [cartographic material] / U.S. Geological Survey ; R.B. Marshall, chief geographer ; Sledge Tatum, geographer in charge ; topography by E.P. Davis and S.E. Taylor ; control by R.B. Robertson, C.H. Semper, and S.E. Taylor.Geological Survey (U.S.)1913"Surveyed in 1911."Includes "Index to shafts" listed alphabetically and by number on map.Map showing responsibility for topography in lower margin.Relief shown by contours and spot heights.cartographic