British Rail Train-Crew Manual - 2500H.P. Type 4
British Railways Diesel Electric Locomotives Nos D138 - D193 (Later Class 46) -
Drivers Guide and General Information - July 1962 - BR
33003/98.
More information can be found here
Wikipedia - British Rail Class 46 -
Derby Sulzers Website
More Information Regarding Preserved Class 46 Locomotives can be
found on the following websites:
Preserved-Diesels - Llangollen-Diesels