| RefNo | JHG/10/4/25 |
| Level | Item |
| Title | Letter to Marthe Vogt |
| Date | 20 May 1960 |
| Description | Letter to Vogt forwarding some results from EG van Proosdij-Hartzema that Gaddum thinks should be communicated to the conference [before production of the book]. Includes 6 pages of figures. |
| Extent | 8pp |
| Format | Carbon copy, photocopies, typescript and printed documents |
| AccessStatus | Open |