Swords against machine-guns? or Voltaire versus the misconstrued Rousseau 3 essays in the changes in the basic priciples and conditions of public relations theory and machinery since the fifties ; a CERP document - Zedtwitz-Arnim, Georg-Volkmar 1925-1993 (Verl. für dt. Wirtschaftsbiographien, Flieger, 1984)