http://tqjunior.thinkquest.org/6174/ http://library.thinkquest.org/J002678F/why.htm http://www.mariner.org/age/introaoe.html http://www.win.tue.nl/cs/fm/engels/discovery/index.html

http://www.mariner.org/age/histvocab.html http://www.ibiblio.org/expo/1492.exhibit/Intro.html http://www.mariner.org/age/introaoe.html