LS/388.3
Midland General Omnibus Company Limited and Notts & Derby Traction Co.: official time table, May...
1945
Derbyshire Record Office
LS/388.34233
British buses and trolleybuses 1950s-1970s: the operatores and their vehicles; part 1: the Midlands
2010
Bryan Donkin Company Ltd of Chesterfield, engineering firm