000			00427pam a2200133a 44500
082			_aBTS _bMONO B-1268
100			_aIngram,S B
245	1		_aDECADE OF PROGRESS IN USE OF ELECTRONIC TUBES.PART1--COMMUNICATION
260			_a _bHer Majesty'S Stationery Office,London _c1941
300			_a14
500			_aBound With Bts Mono B-1261-1267,1269-1299.Lack No1264,1270,1274,1286,1291,1293
964			_gCIRC
997			_aTR17210 C
999			_c401610 _d401610