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British 1820 settlers to South Africa: Transcribed marriage entries for Putterill. https://www.1820settlers.com/genealogy/settlerbrowsemarrs.php?name=PUTTERILL&first= as on 19 May 2020.
Doidge, E.M. South African fungi and lichens to the end of
1945. Bothalia, 1950, Vol. 5, pp.
1-1094 (see p. 41).
FamilySearch: Victor Armsby Putterill. https://www.familysearch.org/en/tree/person/details/G8KR-6G4
Google Scholar, at http://scholar.google.co.za Publications by V.A. Putterill.
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa. Cape Town: Balkema, 1981.
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(NAAIRS), at http://www.national.archives.gov.za/naairs.htm Documents relating to V.A. Putterill.
National Union
Catalogue, pre-1956 imprints. London: Mansell, 1968-1980.
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University of the Cape of Good Hope. Calendar, 1913/4, 1916/7, 1917/8 (pp. 349-359: Colleges).