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Geological map of the 1¬¨‚àû x 2¬¨‚àû Chicago Quadrangle, Indiana, Illinois, and Michigan, showing bedrock and unconsolidated deposits

1. Geological map of the 1¬¨‚àû x 2¬¨‚àû Chicago Quadrangle, Indiana, Illinois, and Michigan, showing bedrock and unconsolidated deposits

Indiana-Illinois, Vincennes quadrangle : topography [1944 printing without vegetation]

2. Indiana-Illinois, Vincennes quadrangle : topography [1944 printing without vegetation]

Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1965 reprint with vegetation]

3. Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1965 reprint with vegetation]

Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1965 printing without vegetation]

4. Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1965 printing without vegetation]

Indiana, 15 minute series (topographic), Vincennes quadrangle. [1915 printing with vegetation]

5. Indiana, 15 minute series (topographic), Vincennes quadrangle. [1915 printing with vegetation]

Indiana-Illinois, Vincennes quadrangle : topography [1946 reprint with corrections and without vegetation]

6. Indiana-Illinois, Vincennes quadrangle : topography [1946 reprint with corrections and without vegetation]

Indiana, 15 minute series (topographic), Vincennes quadrangle. [1934 reprint without vegetation]

7. Indiana, 15 minute series (topographic), Vincennes quadrangle. [1934 reprint without vegetation]

Illinois-Indiana, Ridge Farm quadrangle : 15-minute series [1947 printing]

8. Illinois-Indiana, Ridge Farm quadrangle : 15-minute series [1947 printing]

Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1965 reprint with vegetation]

9. Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1965 reprint with vegetation]

Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1964 printing with vegetation]

10. Princeton quadrangle, Indiana-Illinois : 15 minute series (topographic) [1964 printing with vegetation]