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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.).

49. Millionth Map of Hispanic America

Maps American Geographical Society Library - UWM Libraries Public content
1922, 1924, 1927, 1928, 1929, 1930, 1931, 1932, 1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1945, 1947, 1948, 1949, 1950, 1951, 1952, 1955, 1956, 1958, 1959, 1960, and 1962. American Geographical Society of New York. GeoJSON index map of polygons using the OpenIndexMaps 1.0 schema. Complex geometry including inset maps (Multipolygon) and multiple editions of som... American Geographical Society of New York.