| Reference number | NLB/40/258 |
| Alternative reference number | NLB/40/ p156 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison to Dr J D W Barratt and Dr W Yorke |
| Date | 10 May 1909 |
| Description | 'On a method of estimating the total volume of blood contained in the wing and body.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |