Warship Stock List by J.O. Till
Steam & Diesel Publications.

Western Stock List by J.O. Till
Steam & Diesel Publications.

Diesel-Hydraulic Locomotives of the Westrn Region by Brian Reed
David & Charles ISBN 0 7153 6769 2

WR Diesel-Hydraulics by Norman E. Preedy and G.F Gillham
D. Bradford Barton Ltd