US Army, Technical Manual, TM 55-4920-439-13&P, ELECTRIC/INSTRUMENT SHOP, PART NO. SC-4920-99-CL-A62, (NSN 4920-01-139-4534),
US Army, Technical Manual, TM 55-4920-439-13&P, ELECTRIC/INSTRUMENT SHOP, PART NO. SC-4920-99-CL-A62, (NSN 4920-01-139-4534),