List of sources:
Bullock, A.A. Bibliography
of South African Botany (up to 1951). Pretoria: Department of Agricultural
Technical Services, 1978.
FamilySearch: Johannes Jacobus Kotzé. https://ancestors.familysearch.org/en/GY9R-ZNP/johannes-jacobus-kotzé-1892
Google scholar. http://scholar.google.co.za Publications by J.J. Kotze.
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa. Cape Town: Balkema, 1981.
Keet, J.D.M.
Historical review of the development of forestry in South Africa (n.d.,
n.p., but c. 1972). Digital copy received from Forestry Scientific/Technical
Services, Knysna, January 2011.
Obituary: J.J. Kotze. South African Forestry Journal, 1968, Vol. 65, p. 37.
Ritchie, W. The
history of the South African College, 1829-1918. Cape Town: T. Maskew
Miller, 1918.
South Africa. Department of Forestry. Bulletin No. 6 (1923), 19 (1926), and 21
(1928), by J.J. Kotze.
South
African Journal of Natural History, 1921, Vol. 3, paper
by J.J. Kotze.
South
African Journal of Science, Vol. 16 (1919), 17 (1920), 23
(1926), and 33 (1936): Papers by J.J. Kotze.
Union of South Africa. Public service list, 1914. Pretoria: Government Printer, 1914.
University of the Cape of Good Hope. Calendar, 1908/9, 1909/10, 1912/3.