List of sources:
Lounsbury, C.P. The pioneer period of economic entomology in South Africa. Journal of the Entomological Society of Southern Africa, 1940, Vol. 3, pp. 9-29.
National Automated Archival Information Retrieval System (NAAIRS), at http://www.national.archives.gov.za/naairs.htm Documents relating to David Gunn.
National Union Catalogue, pre-1956 imprints. London: Mansell, 1968-1980.
Smit, B. A further chapter in the history of entomology in South Africa. Journal of the Entomological Society of Southern Africa, 1960, Vol. 23, pp. 3-15.
South African Association for the Advancement of Science. Report, 1915, title of paper by Gunn; 1918, list of members.
South African Journal of Natural History, 1919, Vol. 1(2), pp. 274-277, Members [of the SA Biological Society].
Transvaal Agricultural Journal, 1908/9, Vol. 7 and 1909/10, Vol. 8: Articles by David Gunn.
Union of South Africa. Public Service List, 1914. Pretoria: Government Printer, 1914.