he was a huge believer in training primary-antogonist muscles. i remember he mixed up the routine also,some weeks he would do back/chest on monday-legs on tues-bis/tris/delts on thurs-off friday then repeat mondays workout on saturday. an example chest and back workout looked something like this,we did bench presses supersetted with front chins, incline barbell supersetted with bent rows,flyes supersetted with low pulley rows,pec dec supersetted with hammer strength reverse grip row. it was a great time for me training with bill n hearing him talk about the 70,s golds gym days