war department technical manual Preservation and care of seacoast defense matériel / prepared under direction of the chief of coast artillery structures series Civilian defense : protective construction / prepared by the War Department Army extension courses. Special text : Defense against chemical warfare / prep. under the direction of the Chief of the Chemical Warfare Service for use … field manual Defense against chemical attack training regulations Chemical warfare service / War Department : Defense against chemical warfare / War Department field manual Defense against chemical attack Army extension courses. Special text : Defensive combat and organization of the ground / prep. under the dir. of the Chief of Infantry for use … Army extension courses. Special text : Defensive combat and organization of the ground / prep. under the dir. of the Chief of Infantry for use … Army extension courses. Special text : Defense against chemical warfare / prep. under the dir. of the Chief of the Chemical Warfare Service for use … field manual Defense against chemical attack