"Section D: Puerto Rico Highways"(PDF). Latin America Trade and Transportation Study. Mississippi Department of Transportation. March 2001. Archived from the original(PDF) on 2012-03-06. Retrieved 2014-02-03.
"Section D: Puerto Rico Highways"(PDF). Latin America Trade and Transportation Study. Mississippi Department of Transportation. March 2001. Archived from the original(PDF) on 2012-03-06. Retrieved 2014-02-03.