http://www.worldportsource.com/

http://www.worldportsource.com/countries.php

http://www.allworldshipping.com/ports.asp

http://en.wikipedia.org/wiki/List_of_seaports

http://www.ports-of-the-world.org/

http://en.wikipedia.org/wiki/World\'s_busiest_port

http://www.lmiu.com/lmiu/product/lloyds-list-ports-of-the-world/20001147147-marketing.htm

http://www.overseasmaritime.com/ports/

http://geography.about.com/cs/transportation/a/aa061603.htm

http://www.acemarineinsurance.com/AceinaRoot/ACEMarine/Ocean+Marine/Ports+of+the+World/

http://impoyexpo.com/ports.htm

http://www.findthelinks.com/reference/ports_of_the_world.htm