Thomas Crapper (English Wikipedia)

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GB 189804990, Giblin, Albert, "Improvements in Flushing Cisterns", published 1 March 1898, issued 9 April 1898
GB 189700724, Crapper, George & Wharam, Robert Marr, "Improvements in or relating to Automatic Syphon Flushing Tanks", published 11 January 1897, issued 6 March 1897

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McConnell, Anita (2004). "Crapper, Thomas (1837–1910)". Dictionary of National Biography. Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/55389. Archived from the original on 25 January 2022. Retrieved 10 November 2008. (Subscription, Wikipedia Library access or UK public library membership required.)
Goddard, Donald (26 May 1985), "Group Walks Gain Ground in London", The New York Times, archived from the original on 25 January 2022, retrieved 2 March 2009
Thomas Crapper history, Westminster Abbey, Sandringham, Thomas Crapper & Co., 24 January 2004, archived from the original on 11 December 2008, retrieved 2 February 2009
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"Difference between U, P, and S Traps explained". differencebetween.info. 20 January 2017. Archived from the original on 11 September 2019. Retrieved 30 October 2017.
"Thomas Crapper: Myth & Reality". theplumber.com. June 1993. Archived from the original on 11 November 2017. Retrieved 5 November 2017.
Hart-Davis, Adam, Thomas Crapper – Fact and fiction, ExNet, archived from the original on 18 January 2020, retrieved 13 May 2010
World Wide Words, archived from the original on 7 April 2010, retrieved 11 April 2010

wikipedialibrary.wmflabs.org (Global: 524^th place; English: 218^th place)

McConnell, Anita (2004). "Crapper, Thomas (1837–1910)". Dictionary of National Biography. Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/55389. Archived from the original on 25 January 2022. Retrieved 10 November 2008. (Subscription, Wikipedia Library access or UK public library membership required.)

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"When Did Thomas Crapper Die?". biography.yourdictionary.com. Archived from the original on 7 November 2017. Retrieved 5 November 2017.

Thomas Crapper (English Wikipedia)

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web.archive.org (Global: 1^st place; English: 1^st place)

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yourdictionary.com (Global: 6,318^th place; English: 6,517^th place)