Template:HBSRFs
From The Dreadnought Project
Admiralty, Gunnery Branch (1916). Handbook for Barr and Stroud Naval Range-Finders and Mountings. C.B. 269. The National Archives. ADM 186/205.
Admiralty, Gunnery Branch (1916). Handbook for Barr and Stroud Naval Range-Finders and Mountings. C.B. 269. The National Archives. ADM 186/205.