| RefNo | FS/7/2/686 | 
| Previous numbers | FS/14/2/26, Box 12 | 
| Level | File | 
| Title | Correspondence with Prof Harold Urey, Institute for Nuclear Studies, University of Chicago | 
| Date | 1940-1954 | 
| Description | On such topics as visits to the USA and the UK by Simon and Urey respectively and the providing of assistance to Profs Bonhoeffer and Jost  | 
| Extent | 42 letters | 
| Format | Manuscript and typescript documents | 
| AccessStatus | Open |