History of Twyfords 1680-1982 by James Denley
Twyford's Special Architects' Catalogue of WC Basins - 1887
The History of the Company - Twyfords 1990 - Jim Gibson
UK Design Centre Awards 1963. Twyford's Sola Washbasin - designed by Stanley Ellis
Old Times in The Potteries. By William Scarratt 1906 - references to Twyfords
The House of Twyford - A History to 1971 - Author unknown