[rnisly]

http://www1.coe.neu.edu/~dan/H813-1/go.html

http://www1.coe.neu.edu/~dan/H813-2/go.html

http://www1.coe.neu.edu/~dan/H813-2/go.html

These images were culled from various internet sites.

As you can tell even images are tough to find.

Roger