1. “Letter to Jií Neustupný 03 March 1956.”;BBC Written Archives Centre (BBCWAC)/ TV Talks. Animal, Vegetable, Mineral (Museums O-P) 1952–1959
2. “Archaic Britain. A Monthly Review,”;Nairnshire Telegraph and General Advertiser for the Northern Counties,1937
3. Attenborough, David. Interview with Sir David Attenborough Personal Histories, University of Cambridge, 12th of October 2009 edited by Pamela Jane Smith. http://www2.arch.cam.ac.uk/personal-histories/attenborough/Site/Home_files/FinalAttenboroughTranscript.pdf
4. BBC. 1956. “Animal, Vegetable, Mineral? 03/05/1956”. Accessed 28 March. https://www.bbc.co.uk/iplayer/episode/p017gfjd/animal-vegetable-mineral-03051956