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46. 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.).

48. Modern world on mercator's [sic] projection

Princeton University Restricted content
1951. Rand McNally and Company. North Decimal Degree 90.000000. South Decimal Degree -90.000. East Decimal Degree 160.000. West Decimal Degree -160.000. ... [Chicago] : Rand McNally & Co., 1951.
1951. This is one in a series of 455 mid 20th century fire insurance maps produced by the Fire Insurance Rating Organization of New Jersey. Municipal Fir...