1. Project no. 3 -- Toxic gases in armored vehicles. Partial report on sub-project no. 3-9, Determination of the ventilation requirements for gas-proofing tanks : subject: ventilation requirements for gas-proofing tanks of the M-4 series Author(s): Hatch, Theodore F., authorWalpole, Robert H., author Publication: Fort Knox, Kentucky : Armored Medical Research Laboratory, March 1, 1943 Subject(s): Air Pollutants, OccupationalMotor VehiclesVehicle EmissionsWeaponsVentilationMilitary PersonnelWorld War IIUnited States