000			00379pam a2200145a 44500
082			_aBTS _bMONO 1952
100			_aFord,G T
245	1		_aHIGH-TRANSCONDUCTANCE TUBES FOR BROAD-BAND TELEPHONE SYSTEM USES
260			_a _b _c1951
300			_a10
500			_aBound With Bts Mono 1930-51,1953-59 Lack No.1932
700			_aWalsh,E J
964			_gCIRC
997			_aTR19494 C
999			_c402577 _d402577