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1. Ports: United States and Territories, 2012

2012. United States. Bureau of Transportation Statistics and Institute for Water Resources (U.S.). Navigation Data Center. This point shapefile depicts physical information on commercial facilities at the principal United States coastal, Great Lakes and inland ports. Th... United States. Bureau of Transportation Statistics.

2. U.S. ZIP Code Areas (Three-Digit), 2013

2012. TomTom North America, Inc. U.S. ZIP Code Areas (Three-Digit) represents the first three digits of a ZIP Code. The first digit of a five-digit ZIP Code divides the United Stat...

3. U.S. ZIP Code Points, 2013

2012. TomTom North America, Inc. U.S. ZIP Code Points represents the five-digit U.S. ZIP Code areas as points, plus all ZIP Codes that have no associated area. These ZIP Codes that...