United States. Office of Library and Naval War Records. (1920). Northern barrage and other mining activities. GPO.
Chicago Style (17th ed.) CitationUnited States. Office of Library and Naval War Records. Northern Barrage and Other Mining Activities. [Washington]: GPO, 1920.
MLA (9th ed.) CitationUnited States. Office of Library and Naval War Records. Northern Barrage and Other Mining Activities. GPO, 1920.
Warning: These citations may not always be 100% accurate.