List of sources:
African Court Calendar, 1810-1823, 1827, 1828: Directory of Cape Town.
Burrows, E.H. A history of medicine in South Africa up to the end of the nineteenth century. Cape Town: Balkema, 1958.
Curson, H.H. Matters of veterinary interest, 1795-1881. Chapter V. Journal of the South African Veterinary Medical Association, 1935, Vol. 6, pp. 274-295.
De Villiers, C.C. Geslagsregisters van die ou Kaapse families. Hersien en aangevul deur C. Pama. Kaapstad: Balkema, 1981.
Hoge, J. Personalia of the Germans at the Cape, 1652-1806. Archives Yearbook for South African History, 1946, pp. 1-495.
Kaapsche Stads Courant en Africaansche Berigter, 15 August 1807, p. 1: Gouvernements Advertentie. (National Archives, Pretoria, Vol. KK 598).
Laidler, P.W. & Gelfand, M. South Africa: Its medical history, 1652-1898. Cape Town: Struik, 1971.
National Automated Archival Information Retrieval System (NAAIRS). http://national.archives.gov.za/naairs.htm Documents relating to Wehr, Johan(n) Heinrich Friedrich / Wehr, Johan Heinrich Fredrik Carel Leopold / Wehr, J.H.F.C.L. / Wehr, Dr J.
South African bibliography to the year 1925. London: Mansell, 1979.