many moons ago when I was a young teen playing my big brothers guitar, I found some second hand Peter Paul & Mary music books (which were very good about explaining exactly how the picking pattern went), and a Seeger & maybe a Burl Ives, and they had very good patterns for arpeggio type & pluck type picking which is very nice for accompaning folk songs. Several of the different patterns were referred to as being "Travis" picks, and then the "Carter Family Scratch" is also the quite common bass-down-up (like scratching lightly on the strings) approach, and often was taught in the early 1960's folk music books. My fellow 'catters might run across some of these old books & find some gems in them. As for myself, I care less about the exact picking pattern who did on what "cut" way back when, and I care more about playing & teaching different picking patterns for my musical enjoyment & the process of passing on traditional & folk music to others.