British Naval post and censor marks of the First World War /
Gould, M. H.
Postal History 2000.
Forces Postal History Society.
Burnham-on-Crouch : Postal History 2000 on behalf of the Forces Postal History Society,
1998.
Previous ed.: 1984.
Great Britain. Royal Navy
Postmarks
Postal censor stamps
World War, 1914-1918