000 | 00310pam a2200133a 44500 | ||
---|---|---|---|
082 |
_aBTS _bMONO 1892 |
||
100 | _aGilbert,E N | ||
245 | 1 | _aN--TERMINAL SWITCHING CIRCUITS | |
260 |
_a _b _c1951 |
||
300 | _a21 | ||
500 | _aBound With Bts Mono 1881-91,1893-99. | ||
964 | _gCIRC | ||
997 | _aTR19739 C | ||
999 |
_c402360 _d402360 |