To learn more
about Columbus, check out these sites and sources:
http://www.columbusnavigation.com/
http://en.wikipedia.org/wiki/Christopher_Columbus
http://www.nmm.ac.uk/server/show/conWebDoc.137
http://www.enchantedlearning.com/explorers/page/c/columbus.shtml
http://www.ucalgary.ca/applied_history/tutor/eurvoya/columbus.html
http://www.mce.k12tn.net/explorers/christopher_columbus.htm
http://www.kidport.com/REFLIB/UsaHistory/Columbus/Columbus.htm