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Pulsed Electromagnetic Gas Acceleration Semiannual Progress Report, 1 Jul. - 31 Dec. 1966
Pulsed Electromagnetic Gas Acceleration Fifth Semiannual Progress Report, 1 Jul. - 31 Dec. 1964
Pulsed Electromagnetic Gas Acceleration Eighth Semiannual Progress Report, 1 Jan. - 30 Jun. 1966