Filtering by: Contributor Howard-Bury, Charles, 1881-1963, Associated Name Remove constraint Contributor: Howard-Bury, Charles, 1881-1963, Associated Name Creator Great Britain. Army. General Staff. General Headquarters, Issuing body Remove constraint Creator: Great Britain. Army. General Staff. General Headquarters, Issuing body Format Pamphlets Remove constraint Format: Pamphlets Format pamphlets Remove constraint Format: pamphlets Keyword Unassigned Remove constraint Keyword: Unassigned Resource type text Remove constraint Resource type: text Subject Gas masks Remove constraint Subject: Gas masks