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              Kaczmirek, L., Mayr, P., Vatrapu, R., Bleier, A., Blumenberg, M. S., Gummer, T., et al. (2014). Social media monitoring of the campaigns for the 2013 German bundestag elections on Facebook and twitter. GESIS working papers 31. Available at: https://www.ssoar.info/ssoar/handle/document/38195 (Accessed October 02, 2020).
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              Kaczmirek, L., Mayr, P., Vatrapu, R., Bleier, A., Blumenberg, M., Gummer, T., & Wolf, C. (2014). Social Media monitoring of the campaigns for the 2013 German Bundestag elections on Facebook and Twitter. GESIS Working Paper 31. Köln, DE. Retrieved from http://www.ssoar.info/ssoar/handle/document/38195
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              Kaczmirek, L., Mayr, P., Vatrapu, R., Bleier, A., Blumenberg, M., Gummer, T., et al. (2014). Social media monitoring of the Campaigns for the 2013 German Bun- destag Elections on Facebook and Twitter. Gesis Working Papers (31). Abgerufen von http://www.gesis.org/fileadmin/upload/forschung/publikationen/ gesis_reihen/gesis_arbeitsberichte/WorkingPapers_2014-31.pdf
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              Kaczmirek, L., Mayr, P., Vatrapu, R., Bleier, A., Blumenberg, M., Gummer, T., Wolf, C. (2014). Social media monitoring of the Campaigns for the 2013 German Bun- destag Elections on Facebook and Twitter. Köln, DE: Gesis Working Papers, 31.
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