Ancient Beads

http://www.geocities.com/ladysveva/BeadHistory.html

http://www.glassonline.com/infoserv/history.html

http://www.greecetravel.com/archaeology/mitsopoulou/glass.html

http://www.harlequinbeads.com/cgi-bin/beads/library/article.html?article=LIB00066