Dylan was obviously a great absorber of influences. He would have arrived in the early 60s with a number of pop/rock guitar techniques, and to those he added what he came across on the folk/blues scene. Certainly, he picked up what we used to call "clawhammer" style ( listen to, "Don't think Twice" ). He also played in a "loose" Carter Family strumming style - which also relects Woody's guitar style. He had a general blues finger-picking style - I remember trying to work out how he played " Baby Can I Follow You Down". Also, he did some "so-so" bottle-neck playing. One thing I noticed, watching the recent documentary, is that in some of the early folkie footage, his guitar was invariably a bit out of tune, but. as time passed. the tuning became pretty much spot on.