Redbull you've started like 7 threads or so. Why don't you find a way to ask your questions together? At a glance you had one about leg workouts and then this one. Why not make one thread to cover all your training?
As for back training..
Directly:
(1.) Row variations
(2.) Pullup/Chinup variations
(3.) Pulldown variations
(4.) Straight-arm pulldowns + straight-arm pullovers (isolation)
Indirectly:
(1.) Deadlift variations + Good Mornings
(2.) Clean variations
(3.) Snatch variations
(4.) Squat variations
(5.) Heavy core/stabilizing exercises (e.g. planks, overhead supports, static holds, front squat holds, etc)