Oh, in a word, classic straight pool. If I were more computer literate and thus able to upload, I still have all the break shot pattern diagrams that he passed out to us at his "School for Straight Pool" which he conducted at the Velvet Rail in Lansing Michigan during 1976. Vicki Frechen was also in that class. I still have all the notes I took as well.
Tom was an excellent safety player and taught a lot of lessons about safety play and especially, safety strategy. He was also very adept at finding dead balls in the rack. These lessons have remained a big part of my game since; my safety and deadball play have subsequently developed to a high level. Watching Bobby play is like watching Tom all over again; Tom was that good. Yet, it was always his pattern IDs that were most profound. I see them in Bobby's game in most every rack he plays.
Do a search on the main forum for both parallel and back hand english (BHE).It has been discussed extensively. I have recently worked on converting to BHE, having used the other technique for more than forty years.