His Majesty's Stationary Office (HMSO) Catalogue

Name	Boom
Description	An obstacle strung across a navigable stretch of water to control or block navigation that can be military in nature; a modern example is the anti-submarine net.

Name	The Battle of the Atlantic, The Official Account of the Fight Against The U-Boats, 1939 - 1945
Category	Action at Sea
Issued By	Central Office Of Information
Issued For	none
Published	Oct/1946
iTunes	Available

Name	The Mediterranean Fleet, Greece to Tripoli. The Admiralty Account of Naval Operations: April 1941 to January 1943
Category	Action at Sea
Issued By	Ministry Of Information
Issued For	Admiralty
Published	Sep/1944
iTunes	Available