University of Chicago. 1931. Certificate and letters about the Honorary DSC awarded by the Intercollegiate University of Chicago. Documents in Girton College Archive, Cambridge, UK. Ref. GCPP Procter 5/2/12 (former reference: MSS 7). Indexed with descriptive note at http://janus.lib.cam.ac.uk/db/node.xsp?id=EAD%2FGBR%2F0271%2FGCPP%20Procter%205%2F2%2F12
Anon. 1923. Woman expert is given care of zoo reptiles: Miss Joan Procter appointed curator in London Zoo, The Woodville Republican, Woodville, Mississippi, 1 September. Available at https://news.google.com/newspapers
Anon. 1927. Charms snakes so visitors to zoo may see them better, The Reading Eagle, Reading, Pennsylvania, 11 September, p. 31. Available at https://news.google.com/newspapers
Anon. 1931. Obituary: Miss Joan Procter – A zoologist of genius, The Times, London, 21 September, page 14. Available at http://archive.timesonline.co.uk/
Anon. 1946. Mr E. G. Boulenger: The Aquarium at the Zoo, The Times, London, 2 May 1946, page 7. Available at http://archive.timesonline.co.uk/
Anon. 1925. The Zoological Gardens: Progress with the new Aquarium, The Times, London, 15 June, page 17. Available at http://archive.timesonline.co.uk/
Anon. 1924. New rockwork at the Zoo: The Antelope Paddock, The Times, London, 14 July, page 8. Available at http://archive.timesonline.co.uk/
Anon. 1926. The progress of science: Electrical heating for reptiles – The Zoo experiment, The Times, London, 2 August, page 13. Available at http://archive.timesonline.co.uk/
Anon. 1927. New Reptile House at the Zoo: Official opening next Wednesday, The Times, London, 9 June, page 10. Available at http://archive.timesonline.co.uk/
Chalmers Mitchell, Dr. 1927. Reptiles at the Zoo: Opening of new house today, The Times, London, 15 June, page 17. Available at http://archive.timesonline.co.uk/
Chalmers Mitchell, Peter. 1927. Reptiles at the Zoo: Opening of new house today, The Times, London, 15 June, page 17. Available at http://archive.timesonline.co.uk/
Bellairs, Angus d’A., and D. J. Ball, in Solly Zuckerman, (ed.). 1976. The Zoological Society of London 1826–1976 and Beyond : Proceedings of a symposium held at the Zoological Society of London, 25–26 March 1976 (Symposia of the Zoological Society of London, No. 40), page 120. Academic Press, London. பன்னாட்டுத் தரப்புத்தக எண்0126133409