Filtering by: Contributor Howard-Bury, Charles, 1881-1963, Associated Name Remove constraint Contributor: Howard-Bury, Charles, 1881-1963, Associated Name Keyword Unassigned Remove constraint Keyword: Unassigned Resource type text Remove constraint Resource type: text Subject Gas masks Remove constraint Subject: Gas masks Subject World war, 1914-1918--Pamphlets Remove constraint Subject: World war, 1914-1918--Pamphlets Title Defensive measures against attacks Remove constraint Title: Defensive measures against attacks