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Geological Survey (U.S.)
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Public
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Alabama
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Arizona
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Delaware
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Line
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1972
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1. Major Roads of the United States, 1972-1999
1972. Geological Survey (U.S.). This line shapefile portrays the major roads in the United States, Puerto Rico, and the U.S. Virgin Islands. The file was produced by joining the i... Geological Survey (U.S.).