http://arthur.sewanee.edu/thomapt0/CS276/PTT_Sketch_16_03/web-export/
http://arthur.sewanee.edu/thomapt0/CS276/PTT_Sketch_16_06/web-export/
http://arthur.sewanee.edu/thomapt0/CS276/PTT_Sketch_17_05/web-export/
http://arthur.sewanee.edu/thomapt0/CS276/PTT_Sketch_17_13/web-export/
http://arthur.sewanee.edu/thomapt0/CS276/PTT_Sketch_31_09/web-export/
http://arthur.sewanee.edu/thomapt0/CS276/PTT_Sketch_31_12/web-export/
http://arthur.sewanee.edu/thomapt0/CS276/PTT_Sketch_32_07/web-export/
Pete Thomas