00337nam a2200133Ia 45000030006000000080041000060400015000471000015000622450050000772600041001273000006001685460012001740050017001860STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aJohn, P.P.  aText Book of Two-way communication Techniques  bUniversity of Calicut; Calicutc2005  a0  aEnglish20220125165808.0