000			00321nam a2200133 a 4500
005			20260716125021.0
008			260701s1975 ii 000 0 eng d
041			_aeng
100	1		_aCarlson
245	1	0	_aCommunication system / _cCarlson.
264		1	_aDelhi : _bTata MacGraw-Hill, _c1975.
300			_a493 p.
942			_cBK
999			_c8496 _d8496