Ahem.
Got it right here ... in fact, I was in the right chapter this morning, although I was looking for something else.
A souvenir booklet which was available in 1977 has a blurb in the back about the development of Star Wars, and 'John Carter on Mars' (Burroughs) is cited as an inspiration. That information can only have come from George. In any case, when I referred to Tolkien (amongst 'everything from ... blah blah blah'

I was not thinking of specifics but of fantasy elements and themes. George's storytelling has been influenced by more things than even he can recall, I suspect, and he has a habit of revising his testimony from time to time.