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References
- ↑ Locomotive Rivals from Across the Pond. D. Clough. Rail (magazine), issue 805, Jul-Aug 2016.
- ↑ Haresnape, Brian (June 1984) [1982]. 3: Production Diesel-Electrics Types 4 and 5. British Rail Fleet Survey (2nd ed.). Shepperton: Ian Allan. p. 6. ISBN 0-7110-1450-7. CX/0684.
- ↑ Allen (1981) , p. 19
- ↑ Webb (1982) , p. 91
- ↑ Nock 1985 , p. 75