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National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to William Bisset Berry / William B. Berry / W.B. Berry.
Plug, C. & Levin, G. The South African Geological Association (1888-1890). Africana Notes and News, 1991, Vol. 29(7), pp. 251-261.
Ritchie, W. The history of the South African College, 1829-1918. Cape Town: T. Maskew Miller, 1918.
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William Bisset Berrie. FamilySearch. https://www.familysearch.org/ark:/61903/1:1:XY6T-QJW and William Bisset Berry. FamilySearch. https://www.familysearch.org/ark:/61903/1:1:W48M-58ZM