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              Katz, E. & Lazarsfeld, P. F. (1955). Personal Influencer: The part played by the people in the flow of mass communications. The Free Press. New York.
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              Katz, E. and Lazarsfeld, P. (1955) Personal Influence: The Part Played by People in the Flow of Mass Communication. New York: Free Press.
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              Katz, E., & Lazarsfeld, P. F. (1955). Personal influence: The part played by people in the flow of mass communi- cations. Free Press.
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              Katz, E., & Lazarsfeld, P. F. (1955). Personal influence: The part played by people in the flow of mass communi- cations. New York, NY: Free Press.
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              Katz, E., & Lazarsfeld, P. F. (1955). Personal influence: The part played by people in the flow of mass communic- ations. Transaction Publishers.
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              Katz, E., & Lazarsfeld, P. F. (1955). Personal influence: The part played by people in the flow of mass communications. Glencoe, IL: Free Press.
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              Katz, E., & lazarsfeld, P. F. (1955). Personal influence -the part played by people in the flow of mass communication. Glencoe: Free Press.
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              Katz, Elihu & Lazarsfeld, Paul (1955). Personal influence: The part played by people in the flow of mass communications. New York, NY: The Free Press.
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              Katz, Elihu / Lazarsfeld Paul F. (1955): Personal Influence: The Part Played by People in the Flow of Mass Communications. New York: Free Press.
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              Katz, Elihu and Paul F. Lazarsfeld. 1955. Personal Influence: The Part Played by People in the Flow of Mass Communications. New York: Free Press.
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              Katz, Elihu/Lazarfeld, Paul (1955): Personal influence: The Part Played by People in the Flow of Mass Communications. Glencoe: The Free Press.
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              Katz, Elihu/Lazarsfeld, Paul F., 1955: Personal Influence. The Part Played by People in the Flow of Mass Communication, Glencoe/Ill.: Free Press.
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              Katz, Elihu; Lazarsfeld, Paul F., 1955: Personal Influence: The Part Played by People in the Flow of Mass Communications. Glencoe, IL: Free Press.
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              Lazarsfeld, P., & Katz, E. (1955). Personal Influence: The Part played by People in the Flow of Mass Communication. New York: Free Press.
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