000 00324pam a2200133a 44500
082 _aBTS
_bMONO 1924
100 _aWallace,R L
245 1 _aREPRODUCTION OF MAGNETICALLY RECORDED SIGNALS
260 _a
_b
_c1951
300 _a29
500 _aBound With Bts Mono 1900-23,1925-29
964 _gCIRC
997 _aTR19698 C
999 _c402648
_d402648