| RefNo | Title | Date |
| L/E/51/105 | Letters \ Correspondence with Rudolf Sonner, Germany | 19 April 1947-19 June 1947 |
| L/E/41/46 | Articles about Laban \ Musik, Die \ 'Aus der Geschichte der Tanzschrift' by Rudolf Sonner | 1938 |
| L/E/77/51 | Articles about Laban \ Articles by Rudolf Sonner \ Rudolf v. Laban und der neue deutsche Tanz; Erinnerungen an Rudolf von Laban | n.d. |