British West Indies Study Circle
Arch, Brad. Bermuda Registration Labels, 1993.
Dickgiesser, Robert W. and Yendall, Eric P. King George VI Large Key Type Stamps of Bermuda, Leeward Islands, Nyasaland, 1985.
Forand, Michel and Freeland, C. Charles. Bermuda Mails to 1865: An Inventory of the Postal Markings, 1995.
Ludington and Osborn. Royal Mail Steam Packets to Bermuda and Bahamas, 1971.