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69221. Project no. 20 -- Studies of cold weather clothing. Report on sub-project 20-1, The effect of leakage from closures upon thermal protection (OQMG test number 57 I-A)

69222. 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 : ventilation requirements for gas-proofing the M-5 tank

69223. 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

69224. 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

69226. Project no. 3 -- Toxic gases in armored vehicles. Final report on sub-project no. 3-13 -- Determination of the characteristics and effects upon the crew of gun fumes from firing of the weapons in the M7 tank

69227. Project no. 3 -- Toxic gases in armored vehicles. Final report on sub-project no. 3-15 -- Determination of the characteristics and effects upon the crew of gun fumes from firing of the weapons in the M4A4E1 tank

69228. Project no. 7 -- Night vision from tanks. Report on sub-project no. 7-2, Determination of intensity, distribution and type of illumination in tanks least disturbing to dark adaptation. Sub-project no. 7-3, Investigation of methods of improving night vision in tank crews by the use of eye appliances