1. Project no. 3 -- Toxic gases in armored vehicles. Second partial report on sub-project no. 3-9 -- Determination of ventilation requirements for gas-proofing tanks of the M4 series Author(s): Hatch, Theodore F., authorHollingsworth, E. W., authorWalpole, Robert H., author Publication: Fort Knox, Kentucky : Armored Medical Research Laboratory, 23 June 1943 Subject(s): Air Pollutants, OccupationalMotor VehiclesVehicle EmissionsWeaponsVentilationMilitary PersonnelWorld War IIUnited States