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1. Color image map : [ports of entry, United States-Mexican border] /

Geological Survey (U.S.), cartographer, issuing body. The Survey,.

2. Hydrologic unit map[s] 1974 [of states of the United States] /

Geological Survey (U.S.). The Survey,.

5. National atlas. [United States]

Geological Survey (U.S.). The Survey,.

6. The geographic face of the nation--land cover

Geological Survey (U.S.). The Survey,.

7. The national atlas of the United States of America.

Geological Survey (U.S.). The Survey,.