SD4 Pics
* [http://sage.math.washington.edu/home/burhanud/SD4_pics Iftikhar Burhanuddin]
* [http://sage.math.washington.edu/home/wdj/sd4photos/images.html David Joyner]
* [http://sage.math.washington.edu/home/burhanud/SD4_pics Iftikhar Burhanuddin]
* [http://sage.math.washington.edu/home/wdj/sd4photos/images.html David Joyner]