1900. Mason, Charles, 1728-1786. Shows the northern part of the Mason and Dixon line.; Originally published with: A plan of the west line, or parallel of latitude, which is the bou... Maryland Historical Society (Baltimore, Md).
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1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
2002. National Atlas of the United States. This polygon shapefile portrays a selected set of information that was collected for the 2002 Census of Agriculture by the National Agricultural St... National Atlas of the United States.
2007. National Atlas of the United States. This polygon shapefile portrays a selected set of information that was collected for the 2007 Census of Agriculture by the National Agricultural St... National Atlas of the United States.
19. Antietam
1862. Michler, N. (Nathaniel), 1827-1881, cartographer. Scale 1:21,120. 3 in. to 1 mile; 1 map; [58 x 66 cm] Antietam, Battle of, Md., 1862--Maps.
2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.