| RefNo | HD/12/2/49 |
| Previous numbers | 93HD.47.13.52 |
| Level | Item |
| Title | Copy secretary to Dale to Sir Percival Hartley, National Institute for Medical Research |
| Date | 25 September 1945 |
| Description | Forwarding a letter received from Dr Mario Prado but intended for the Department of Biological Standards at the Institute |
| Extent | 1p |
| Format | Carbon copy |
| AccessStatus | Open |
| AccessConditions | OPEN - but with some restrictions |