| Level | Item |
| Ref No | L/E/66/4 |
| Alt Ref No | E(L)/66/4 |
| Title | Industrial Rhythm \ Letter from Off. Cadet Van Etten |
| Date | 25 May 1946 |
| Extent | 2 sheets |
| Description | Handwritten letter to Rudolf Laban from an officer of the Royal Netherlands Army, asking him specific questions about his theories. |
| Language | English |
| Physical Description | Original reference number was 37/L/093/05/1/B/1. Contains a handwritten annotation by Laban. Pages numbered I-II. |
| Format | Papers |