00582cam a22002057a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093110001100102245006900113260002700182300001000209490005100219650002900270700002600299830005100325CHAP20220817042501.0971013s1972            r     00010     d  a45965  a46937  a51078  cCHAP  aUNESCO14aThe practice of mass communicationb: some lessons from research  aParis :bUNESCO,c1972  a52 p. 0aReports and papers on mass communicationv; 6514aComunicación de masas.0 aRao, Y. V. Lakshmana.0 aReports and papers on mass communicationv; 65