https://www.lrsoc.com/forum/forum_files/Service%20Bulletin%2029%20Noise%20from%20Tappets.pdf 50029 (Internal) – Noise from Tappets / Valve Gear
https://www.lrsoc.com/forum/forum_files/ServiceBulletin4W1.pdf 5251 – TECHNICAL SPECIFICATION: 1954 LAND ROVER 86″ & 107″
https://www.lrsoc.com/forum/forum_files/ServiceBulletin4U1.pdf 5250 – 1954 LAND ROVER 86″ & 107″ UNIT NUMBERING
https://www.lrsoc.com/forum/forum_files/ServiceBulletin4R1.pdf 5253 – 4/R1 – BODY: SIDE SCREEN HINGE BRACKET FRACTURE
https://www.lrsoc.com/forum/forum_files/Service%20Bulletin%20Cover%201953.pdf Rover Company 1953 Service Bulletins: Cover Only
