Links
Some interesting links regarding M.C. Escher's life and work:
www.etropolis.com/escher/index.html
www.nga.gov/collection/gallery/ggescher/ggescher-main1.html
www.mathacademy.com/pr/minitext/escher/
www.djmurphy.demon.co.uk/escher.htm
users.erols.com/ziring/escher_bio.htm
escherdroste.math.leidenuniv.nl/index.php?menu=intro
www.britton.disted.camosun.bc.ca/home.htm
www.britton.disted.camosun.bc.ca/jbescher.htm
www.britton.disted.camosun.bc.ca/jbimpstair.htm
www.nga.gov/cgi-bin/psearch?Request=S&Hname=escher&Person=201590
http://cybermuse.gallery.ca/cybermuse/youth/escher/index_e.jsp
http://www.earlmwashington.com