| Reference number | LBO/6/49 |
| Alternative reference number | LBO/6/119 |
| Level | File |
| Title | Copy letter from Henry Oldenburg, London, to de Graaf |
| Date | 15 May 1673 |
| Description | ' An Aanswer to Dr De Graaf's letter dated 28 April 1673.' |
| Language | Latin |
| Extent | 2p |
| Format | Manuscript |
| Access status | Open |