000			00343pam a2200157a 44500
008			230515b1993 xxu||||| |||| 00| 0 eng d
020			_aNULL
041			_aENGLISH
082			_aN.D.
100			_aBiswas N.N.
245			_aPrinciles Of Telephony
250			_a0
260			_aNULL _bRadiant Book _c1993
300			_a138
650			_aNULL
999			_c574535 _d574535