List of sources:
Cohen, A.B. Mary Elizabeth Barber, the Bowkers and South African prehistory. South African Archaeological Bulletin, 1999, Vol. 54, pp. 120-127.
Cohen, A.B. Notes on southern African stone tool collectors represented in the collections of the British Museum (Natural History). Unpublished notes, 2001.
FamilySearch: Charles James Busk. https://www.familysearch.org/search/record/results?q.anyDate.from=1820&q.givenName=Charles James&q.surname=Busk
Geni: Charles James Busk, at http://www.geni.com/people/Charles-Busk/6000000016519591267 Retrieved 2016-1-26.
Goodwin, A.J.H. A commentary upon South African prehistory up to the introduction of the new terminology. Bantu Studies, 1935, Vol. 9, pp. 291-333; bibliography pp. 387-413.
Google scholar. http://scholar.google.co.za Publications by C.J. Busk.
Mitchell, P.J. The South African stone age in the collections of the British Museum: Content, history and significance. South African Archaeological Bulletin, 1998, Vol. 53, pp. 26-36.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Charles James Busk/Charles J Busk.
RCS Photographers
Index, at http://www.lib.cam.ac.uk/rcs_photographers/entry.php?id=107 Retrieved 2016-1-26.