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"Advertising". South Australian Register. Vol. LI, no. 12, 405. South Australia. 17 August 1886. p. 1. Retrieved 6 November 2016 – via National Library of Australia.
"Charles Birks & Co". The Advertiser (Adelaide). South Australia. 12 July 1933. p. 16 (South Australian Register (Adelaide SA : 1839–1900)). Retrieved 5 November 2016 – via National Library of Australia.
"Personal". The Register (Adelaide). Vol. LXXXVIII, no. 25, 647. South Australia. 10 March 1923. p. 8. Retrieved 7 November 2016 – via National Library of Australia.
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catalogue.nla.gov.au
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