000 00317pam a2200133a 44500
082 _a621.38
_bC886m
100 _aCrowley, Thomas H.
245 1 _aMODERN COMMUNICATIONS
260 _aN. Y.
_bColumbia University Press
_c1962
300 _a340
650 _aTelecommunication
964 _gCIRC
997 _a52434 W
999 _c442560
_d442560