1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). Alabama Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Alabama. Environmental Systems Research Institute, Inc. (ESRI).
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1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). Alaska Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Alaska. Environmental Systems Research Institute, Inc. (ESRI).
1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). Arizona Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Arizona. Environmental Systems Research Institute, Inc. (ESRI).
1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). Arkansas Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Arkansas. Environmental Systems Research Institute, Inc. (ESRI).
1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). California Major Roads represents interstate, U.S., and state highways and other major thoroughfares within California. Environmental Systems Research Institute, Inc. (ESRI).
1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). Colorado Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Colorado. Environmental Systems Research Institute, Inc. (ESRI).
1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). Connecticut Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Connecticut. Environmental Systems Research Institute, Inc. (ESRI).
1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). Delaware Major Roads represents interstate, U.S., and state highways and other major thoroughfares within Delaware. Environmental Systems Research Institute, Inc. (ESRI).
1999. Geographic Data Technology, Inc. (GDT), Harvard Geospatial Library, and Environmental Systems Research Institute, Inc. (ESRI). District of Columbia Major Roads represents interstate, U.S., and state highways and other major thoroughfares within District of Columbia. Environmental Systems Research Institute, Inc. (ESRI).
2002. United States. Bureau of Transportation Statistics and Environmental Systems Research Institute (Redlands, Calif.). U.S. National Transportation Atlas Highways represents rural interstates and arteries; and urban freeways, expressways, interstates, and arteries. ... ESRI.