Welsh Student Self-Help Council. Ychwanegu i'r clipfwrdd 24-26. Is-gyfres Rhan oKitty Idwal Jones Papers,
Welsh printed books. Files of manuscript and typescript notes, including details of the physical bibliography, on Welsh printed books. Ychwanegu i'r clipfwrdd 1-6. Is-gyfres Rhan oKitty Idwal Jones Papers,