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Start Over Year 1922 File Format JPEG2000 Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Illinois, Carbondale quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1922. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1919 and 1921.";"Surveyed in cooperation with the State of Illinois.";Relief shown by contours and spot heig... Geological Survey (U.S.) and Geological Survey Division (Urbana, Ill.).

2. Wisconsin-Illinois, Monroe quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1922. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1919-1920.";"Surveyed in cooperation with the States of Wisconsin and Illinois.";Relief shown by contours an... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Geological and Natural History Survey (Madison, Wis.).