↑ "Sir George Grey (1812–1898)". Australian Dictionary of Biography. National Centre of Biography, Australian National University. Retrieved 23 March 2016.
↑ "Botswana". www.worldstatesmen.org. Retrieved 12 September 2024.
1 2 Holland, D.F. (1971). Steam Locomotives of the South African Railways. Vol.1: 1859–1910 (1sted.). Newton Abbott, England: David & Charles. pp.11–15, 18, 23. ISBN978-0-7153-5382-0.
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