Technical 'as built' digrams of each class and variation. - Dated March 1973. - Approx 120 pages.
1969-73 British Rail Main Line Diesel Locomotive Railway Diagrams x20 Ref C
1969-73 British Rail Main Line Diesel Locomotive Railway Diagrams x20 Ref A
1969-73 British Rail Main Line Diesel Locomotive Railway Diagrams x20 Ref B
1969-73 British Rail Main Line Diesel Locomotive Railway Diagrams x20 Ref F
1969-73 British Rail Main Line Diesel Locomotive Railway Diagrams x20 Ref D
1969-73 British Rail Main Line Diesel Railway Locomotive x19 Ref H
