Direct from the Mathematics Department at Northwestern University, The Klein Four!
VIDEO:
http://www.youtube.com/watch?v=UTby_e4-Rhg
WEB SITE:
http://www.kleinfour.com/
ALBUM REVIEW:
http://www.cafepress.com/kleinfour.22765484?pid=4640032
VIDEO:
http://www.youtube.com/watch?v=UTby_e4-Rhg
WEB SITE:
http://www.kleinfour.com/
ALBUM REVIEW:
http://www.cafepress.com/kleinfour.22765484?pid=4640032