1935. Cable and pipeline areas denoted.
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1943. Index map of the survey of 1942 of the Delaware River from Philadelphia, PA to Bombay Hook, DE.
1796. Map showing the states of Maryland and Delaware, with parts of Pennsylvania. 28 x 21.7 cm; 1 images; color. Denison, J.
1939. United States. Department of the Interior. Map created from a United States Department of the Interior geological survey. Topography was surveyed by R. H. Runyan, 1939. Map consists mainly o...
1925. National Geographic Society (U.S.). Map Department. Relief shown by gradient tints and hachures.; Includes 3 inset maps.; Inset maps: Washington and vicinity -- Baltimore and vicinity --Wilmington an... National Geographic Society (Washington, D.C).
1770. Scale approximately 1:80,000; 1 map; 44 x 53 cm Pennsylvania--Maps--Early works to 1800.
1927. United States. Bureau of Public Roads. Base map from U.S. Geological Survey state map.; "Data corrected to Dec 31, 1927." 46 x 71 centimeters, on sheet 55 x 79 centimeters Scale 1:500,00... U.S. Geological Survey (Washington, D.C).
1830. Color map of the states Maryland, Delaware, and Virginia, 1830. Map includes New Jersey and most of New York. There is handwriting on both sides of... H. & F.J. Huntington (Firm).
1799. Map showing the states of Maryland and Delaware, 1799. 25.9 x 21.2 cm; 1 images; color. Anderson, John.
1979. Map of land use and open space plan presented by the Delaware Valley Regional Planning Commission.