^Royal Photographic Society. Progress medal. Web-page listing people, who have received this award since 1878 (Archived copy. [19 April 2013]. （原始内容存档于22 August 2012）.): "Instituted in 1878, this medal is awarded in recognition of any invention, research, publication or other contribution which has resulted in an important advance in the scientific or technological development of photography or imaging in the widest sense. This award also carries with it an Honorary Fellowship of The Society. […] 1898 Ferdinand Hurter and Vero C Driffield […]"
Hardie, David William Ferguson. A History of the Chemical Industry of Widnes. London: Imperial Chemical Industries Limited, General Chemicals Division. 1950. ASIN B0007JBZRQ.
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