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Martindale, Barbara (1 March 1996). Caledonia: Along the Grand River. ISBN 978-0-920474-81-5. "McFeely's Square Drive Screws". Archived from the original on 22...9 KB (797 words) - 00:30, 21 August 2024
Caledonia: along the Grand River. Toronto: Natural Heritage. pp. 57–58. ISBN 9780920474815. Melady, John (2013). Breakthrough! Canada's greatest inventions and...12 KB (1,308 words) - 15:34, 11 November 2023
