Search

Start Over Year 1951 Publisher Geological Survey (U.S.) Bounding Box -180 -89.81531 180 89.456192

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

Maps University Of Illinois Urbana Champaign Public content
1951. Geological Survey (U.S.). Contour interval 10 feet;"Culture and drainage in part compiled from aerial photographs taken 1938-1939. Topography by plane-table methods 1949-195... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

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

Maps University Of Illinois Urbana Champaign Public content
1951. Geological Survey (U.S.). Contour interval 10 feet.;"Culture and drainage in part compiled from aerial photographs taken 1940-1941. Topography by plane-table methods, 1926, ... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).