![Color image map : [ports of entry, United States-Mexican border]](https://tile.loc.gov/image-services/iiif/service:gmd:gmd370m:g3701m:g3701fm:gct00042:cs000001/full/!1200,1200/0/default.jpg)
Library of Congress — Maps
Color image map : [ports of entry, United States-Mexican border]
geological survey · 1979
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