Search

Start Over Year 1921 File Format JPEG2000 Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Illinois, Vermont quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1921. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1916 and 1919.";"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. Kentucky-Illinois Golconda quadrangle : topography

Maps University Of Illinois Urbana Champaign Public content
1921. Geological Survey (U.S.). Contour interval 20 feet.;"Surveyed in 1914, 1916 and 1920.";"Surveyed in cooperation with the States of Kentucky and Illinois."; (W 88⁰30ʹ00ʺ--W 8... Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Kentucky Geological Survey (Lexington, Ky.).