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Start Over Year 1955 Publisher Geological Survey (U.S.) Bounding Box -180 -89.81531 180 89.456192

1. Mechanicsburg quadrangle, Illinois : 15 minute series (topographic).

Maps University Of Illinois Urbana Champaign Public content
1955. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1950-1951. Topography by plane-table surveys 1954";R... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2. Sailor Springs quadrangle, Illinois : 15 minute series (topographic)

Maps University Of Illinois Urbana Champaign Public content
1955. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1952. Topography by plane-table surveys 1953.";Relie... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

3. Teutopolis quadrangle, Illinois : 15 minute series (topographic)

Maps University Of Illinois Urbana Champaign Public content
1955. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1952. Topography by plane-table surveys 1952-1953.";... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).