1. Backtrack 2014 Volume 28 - Steamindex

    www.steamindex.com/backtrak/bt28.htm

    Backtrack magazine:illustrated journal about railway and locomotive history

  2. Backtrack Volume 31 (2017) - Steamindex homepage

    www.steamindex.com/backtrak/bt31.htm

    Published by Pendragon, Easingwold, YO61 3YS. January (Number 309) GWR 'King' 4-6-0 No.6006 King George I is monarch of all it surveys at Swindon Works in February 1960.