Stephen Hawking Archive, GBR/0012/MS Add.10440, Box: GBR/0012/2021/010 Digital Carriers: Box 1; Box: GBR/0012/2021/010 Digital Carriers: Box 2; Box: GBR/0012/2021/010 Digital Carriers: Box 3. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/resources/14315 Accessed November 30, 2024.