http://en.wikipedia.org/wiki/Christopher_Columbus
http://wilstar.com/holidays/columbus.htm
http://www.historyguide.org/earlymod/columbus.html
_ Mel-O-Toons: Christopher Columbus
http://jp.youtube.com/watch?v=kuvRFZ4Mxbo
_ 1492 (Christopher Columbus sighting land)
http://jp.youtube.com/watch?v=a6E8N9N3l_E
_ 1492 - Conquest of Paradise - The new world
http://jp.youtube.com/watch?v=-6W2RKheUrE
