"Prof. J. B. Haycraft" (obituary). Nature, 1923, vol. 111, p. 124, doi:10.1038/111124a0
handle.net
hdl.handle.net
Haycraft, John Berry (1888). History, development, and function of the carapace of the chelonia (Thesis). University of Edinburgh. hdl:1842/24687.
Haycraft, John Berry (1888). Examination of those factors which influence man's well-being and mental progress (Thesis). University of Edinburgh. hdl:1842/23977.