^Boddy, M.G.; Neve, E.; Yeadon, W.B. (April 1973). Fry, E.V. (ed.). Part 2A: Tender Engines - Classes A1 to A10. Locomotives of the L.N.E.R. Kenilworth: RCTS. p. 5. ISBN0-901115-25-8.
^Ian Allan ABC of British Railways Locomotives, summer 1961 edition, part 4, page 26
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