US Army, Technical Manual, TM 5-4310-385-13, COMPRESSOR, RECIPROCATING, AIR: ELECTRIC MOTOR DRIVEN 5 CFM, 175 PSI C&H MODEL 20-918, (NSN 4310-01-252-3957), military manauals, special forces
US Army, Technical Manual, TM 5-4310-386-14, COMPRESSOR UNIT, DIESEL ENGINE DRIVEN 20 CFM, 3200 P MODEL K-20-D, (NSN 4310-01-227-1408), military manauals, special forces