| RefNo | FS/7/2/17 | 
| Previous numbers | FS/14/2/26, Box 1 | 
| Level | File | 
| Title | Correspondence with Dr JG Aston, Pennsylvania State College | 
| Date | 1949-1950 | 
| Description | Mostly on the possibility of Aston wotking at the Clarendon Laboratory, Oxford | 
| Extent | 4 letters | 
| Format | Manuscript and typescript documents | 
| AccessStatus | Open |