PH-131
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References
TM 11-2331 Projector Equipment PH-131-K. Dept. of the Army. Jul. 1949. 126 p. U408.3.A13 TM 11-2331 Jul. 1949
TM 11-2331 Projector Equipment PH-131-K. Dept. of the Army. Jul. 1949. 126 p. U408.3.A13 TM 11-2331 Jul. 1949