GWR 6000 Class (English Wikipedia)

Borough of Swindon, pp. 1, 15 (The Arms of Swindon). "The Office of Mayor" (PDF). Swindon Borough Council. Archived from the original (PDF) on 3 September 2014. Retrieved 27 August 2014.

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Borough of Swindon, pp. 1, 15 (The Arms of Swindon). "The Office of Mayor" (PDF). Swindon Borough Council. Archived from the original (PDF) on 3 September 2014. Retrieved 27 August 2014.

"Volume Two: The Great Western Castles & Kings 4-6-0's". What Happened To Steam. 28 February 2014. Retrieved 17 September 2017.
"Volume Two: The Great Western Castles & Kings 4-6-0's". What Happened To Steam. 28 February 2014. Retrieved 17 September 2017.

Champ (2018), p. 321. Champ, Jim (2018). An Introduction to Great Western Locomotive Development. Barnsley: Pen & Sword Transport. ISBN 978-1-4738-7784-9. OCLC 1029234106. OL 26953051M.
Allcock et al. (1951), pp. 33, 35, 36. Allcock, N.J.; Davies, F.K.; le Fleming, H.M.; Maskelyne, J.N.; Reed, P.J.T.; Tabor, F.J. (June 1951). White, D.E. (ed.). The Locomotives of the Great Western Railway, part one: Preliminary Survey. Kenilworth: RCTS. ISBN 0-901115-17-7. OCLC 650412984. {{cite book}}: ISBN / Date incompatibility (help)