1950. Geological Survey (U.S.). Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken 1948. Topography by plane-table methods 1948.";Relief... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
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1950. Tax, Sol, 1907-1995. Shows ethnic change by block.; Scale [ca. 1:5,800]; ms., color; Master and use copy. Digital master created according to Benchmark for Faithful Rep...
1950. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1939. Topography by plane-table methods 1948";Relief... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).
1950. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1921.";Relief shown in contours.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Geological and Natural History Survey (Madison, Wis.).