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[Topographic maps of the United States] Illinois topography…mapped, edited and published by the Geological Survey in cooperation with State of Illinois Geological Survey
Printed, colored maps
42 cm W x 52 cm H (Item)
1 inch = 1 mile (with exceptions noted)
Title varies. Some maps have narrative description of the series printed on the verso. For a listing of quadrangle maps in the collection see the following pages. The individual maps are alphabetically arranged by quadrangle name within folders assigned location symbols as shown. Ottawa-Waukegan Quadrangles