00529nam a22001817a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093100002300102245010500125260004400230300001000274650003500284650002800319CHAP20220329140150.0971013s1973            r     00010 eng d  a47960  a48932  a53080  cCHAP00aVarma, Ravie, ed.1 aAction research and the production of communication mediab: report of the all India Field Worksp...  a(s.l.) :bUniversity of Reading,c1973)  a32 p.14aComunicación en agricultura.14aExtensión agrícola.