U.S. Department of Health & Human Services
Safeguarding information: Instructor's period guide : state and local gas specialist schools
Instructor's period guide
United States. Office of Civilian Defense, author, issuing body.
Washington, D.C. : Office of Civilian Defense, March 30, 1943
Civil Defense -- education
Gases -- standards
Respiratory Protective Devices
Gas Poisoning -- prevention & control
World War II
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