00489namua2200169 a 450000100180000000800410001824500320005925000190009126000500011030000110016050000130017165300340018465300270021865300330024570000240027800500170030200000000000029477070429s1960    xxu           000   eng  10aMass communicationsh[Text]  aSecond edition  aUrbana:bUniversity of Illinois Press,c1960.  a700 p.  aп/20104  acommunications and government  acommunications systems  ainternational communications1 aWilbur Schramm4edt20260805124644.0