| Level | Item |
| Ref No | L/E/75/28 |
| Alt Ref No | E(L)/75/28 |
| Title | Industrial Rhythm \ Hijmans' Report \ Costing with the Aid of Parameters |
| Date | 15 February 1946 |
| Extent | 16 sheets |
| Description | Typed manuscript with handwritten diagrams by Ernst Hijmans. |
| Language | English |
| Physical Description | Original reference number was IR/F/1/e. Pages numbered 1-15. |
| Format | Papers |