000			00316nam a22001457a 4500
003			OSt
020			_a9789327276541
082			_a630.715 R22E
100			_aRay, G L
245			_aExtension communication and management
250			_a8th
260			_aLudhiana _bKalyani _c2021
300			_a382
942			_2ddc _cC _07
999			_c12868 _d12868