Voltmer, K., 1992: Masse media: Political independence of press and broadcasting systems. Discussion Paper FS 111 93-205. Berlin: Wissenschaftszentmm WZB.
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Voltmer, Katrin (1993). Mass Media. Political Inde- pendence of Press and Broadcasting Systems, Discussion Paper, Wissenschaftszentrum Berlin für Sozialforschung, Berlin.
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Voltmer, K. (1993). Mass Media. Political Inde- pendence of Press and Broadcasting Systems. Berlin: Wissenschaftszentrum Berlin für Sozialforschung. Discussion Paper FS.
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