List of sources:
FamilySearch: George Potts. https://www.familysearch.org/ark:/61903/3:1:3Q9M-C91L-NS7J-L?view=index&personArk=/ark:/61903/1:1:8TD4-756Z&action=view&cc=3732502&lang=en&groupId= AND https://www.familysearch.org/ark:/61903/1:1:KDC1-L9Y?lang=en AND https://www.familysearch.org/ark:/61903/1:1:682N-WS14?lang=en
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa. Cape Town: Balkema, 1981.
Journal of South African Botany, 1937, Vol. 3, paper by Potts.
National Automated Archival Information Retrieval System (NAAIRS). http://national.archives.gov.za/naairs.htm Documents relating to Potts, George.
National Union Catalogue, pre-1956 imprints. London: Mansell, 1968-1980.
Orange River Colony. Civil service list, 1905/6, 1907, 1910.
Phillips, E.P. A brief historical sketch of the development of botanical science in South Africa and the contribution of South Africa to botany. South African Journal of Science, 1930, Vol. 27, pp. 39-80.
Phillips, E.P. Memories of South African botanists. South African Journal of Science, 1965, Vol. 61, pp. 291-296.
Philosophical Society of the Orange River Colony. Transactions, 1903-1907, Vol. 1, list of members.
Royal Society of South Africa. Transactions, 1910, Vol. 1, and 1917, Vol. 6: Lists of Fellows and members.
South African Association for the Advancement of Science. Report, 1905/6, 1907, 1908, 1910, 1913, 1914, 1918: Office bearers and lists of members.
South African Journal of Science, 1918-1922, Vol. 15, 18 and 19: Papers by Potts; 1937, Vol. 34, pp. xliii-xix: Presidents and secretaries of the sections.
South African Philosophical Society. Transactions, 1906-1907, Vol. 16 and 17: Lists of members.
South African who's who, 1917/8, 1919/20, 1923/4, 1927/8, 1931/2, 1936, 1939, 1944, 1945, 1946.
University of the Cape of Good Hope. Calendar, 1908/9-1917/8.
Who was who, Vol. 4, 3rd ed. London: Adam & Black, 1964.