(页面存档备份,存于互联网档案馆) Hertha Ayrton's papers in the Royal Society's archives Digitalcopy of the Electric Arc (1902) Project Continua: Biography of Hertha Ayrton
Manila, Philippines: Liberería Manila Filatélica. (Digitalcopy found online at HathiTrust Digital Library on March 31, 2010) https://books.google.com/books