Inspection and preventive maintenance services for water supply systems at fixed installations - USA Voorschrift, Technical Manual, 5-661 Storage batteries for signal communication except those pertaining to aircraft - USA Voorschrift, Technical Manual, 11-430 Instructions for learning international morse characters - USA Voorschrift, Technical Manual, 11-459 Electrical communication systems equipment - USA Voorschrift, Technical Manual, 11-487 Radio set SCR-694-C - USA Voorschrift, Technical Manual, 11-230C Radio set SCR-300-A - USA Voorschrift, Technical Manual, 11-242 Radio set SCR-502 - USA Voorschrift, Technical Manual, 11-256 Radio sets SCR-193-A, SCR-193-B, SCR-193-C, SCR-193-D and SCR-193-E - USA Voorschrift, Technical Manual, 11-273 Radio sets SCR-509-(*) and SCR-510-(*) - USA Voorschrift, Technical Manual, 11-605 Radio set AN/TRC-6 (XC-2) : preventive maintenance and auxiliary equipment - USA Voorschrift, Technical Manual, 11-633 Radio receivers BC-312-(*), BC-312-(*)X, BC-342-(*), BC-314-(*) and BC-344-(*). - USA Voorschrift, Technical Manual, 11-850 Test sets 1-61-A, 1-61-B and 1-61-C - USA Voorschrift, Technical Manual, 11-346