I’m not going to quote from this bio of Bukka White because the whole thing is so interesting, particularly the involvement of John Fahey. You can hear White’s influence in his music. Please check it out.
Another bio says that White’s young cousin is none other than B.B. King, and that White gave him his first guitar.
Here are Panama Limited, which is mentioned in the first bio, Fixin’ to Die Blues and two songs — Aberdeen Mississippi Blues and another version of Poor Boy A Long way From Home. I am not a guitarist, but I’ve never seen anyone play slide that way.