Anderson, Antony F. (1978). "Sparks from Steam"(PDF). Electronics and Power (January). Archived(PDF) from the original on 23 April 2016. Retrieved 19 June 2018.
Anderson, Antony F. (1978). "Sparks from Steam"(PDF). Electronics and Power (January). Archived(PDF) from the original on 23 April 2016. Retrieved 19 June 2018.