The Rupert Ratio Unit Single Engine Manual for BSA C15, B40, B25, B44, B50 by Rupert Ratio: very good Paperback (2000) | Big Bill's Books
Bsa Unit Singles C15 To B50 1958-73 Motorcycle Monographs Booklet Roy Bacon | eBay
BSA Unit Singles: The Complete Story including the Triumph Derivatives: Vale, Matthew: 9781861268433: Amazon.com: Books
Triumph / BSA Unit Singles Engine Gasket Sets - 1958-73
BSA Unit Singles: The Complete Story Including the Triumph Derivatives (Hardback) - Common: 0884612793327: Amazon.com: Books
BSA Unit Singles - Autobooks-Aerobooks
The Rupert Ratio Unit Single Manual: Everything but the Engine BSA C15, B40, B25, B44, B50, Triumph TR25W: Volume 2 by Ratio, Rupert: Near Fine Soft cover (2014) | Broadleigh Books