"Cabinet: Note on Tube Alloys, 1954", 14 Dec 1954, GBR/0014/CHUR 2/217/15. The Papers of Sir Winston Churchill, GBR/0014/CHAR, CHUR and CHAQ. Churchill Archives Centre. https://archivesearch.lib.cam.ac.uk/repositories/9/archival_objects/1427470 Accessed June 22, 2024.