Diesel Multiple Unit Trains Blue Square Coupling Code
Training notes on "Diesel Multiple Unit Trains Blue Square Coupling Code" from the British Railways (London Midland Region) M.P. Diesel Training School at Derby, dated August 1962.
Training notes on "Diesel Multiple Unit Trains Blue Square Coupling Code" from the British Railways (London Midland Region) M.P. Diesel Training School at Derby, dated August 1962.
