000			00428nam a22001577a 4500
008			230504b |||||||| |||| 00| 0 eng d
040			_aNational Science Library _cNational Science Library
080			_a621.39 _bM5
245			_aTelecommunications
250			_a2nd ed.
260			_aDelhi: _bCBS Publishers & Distributors, _c1985
300			_a803p.
650			_aScience
653			_aPhysics
942			_2udc _cBK
999			_c40560 _d40560