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Creator:
Geological Survey (U.S.)
Dct Subject Sm:
Railroads
Time Period:
1950-1999
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Datasets (21)
Imagery (39)
Maps (48)
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Raster data (4)
Thematic maps (2)
Topographic maps (46)
Vector data (3)
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Indiana University (1)
Pennsylvania Spatial Data Access (PASDA) (25)
Pennsylvania State University (2)
University of Illinois Urbana-Champaign (80)
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