If you search on Google you will find that Bill Lee is credited as the Bassist on The Greatest Songs of Woody Guthrie but it does not specifically cite that Reuben James came from that Weavers album. Probably it did. Having both albums I do not see Bill Lee credited (or any other bassist). One can, I feel, assume it was he since he is credited for the entire Greatest Songs --which is probably a bit over the top.

Speaking of Bill Lee. I have a wonderful B/W publicity shot given to me by Carolyn Hester that shows a young Hester along with Dylan and Lee in the shot. Both having appeared on one of her early albums.

Bill Hahn