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              Curtin, R., Presser, S. & Singer, E. (2005). Changes in Telephone Survey Nonresponse over the Past Quarter Century. Public Opinion Quarterly, 69, 87-98.
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              Curtin, R., Presser, S. & Singer, E. (2005). Changes in telephone survey nonresponse over the past quarter century. Public Opinion Quarterly 69, 87-98.
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              Curtin, R., Presser, S., & Singer, E. (2005). Changes in Telephone Survey Nonresponse over the Past Quarter Century. Public Opinion Quarterly, 69, 1, 87-98.
                 (xsd:string)
              
            
              Curtin, R., Presser, S., & Singer, E. (2005). Changes in telephone survey nonresponse over the past quarter century. Public Opinion Quarterly, 69(1), 87-98. http://doi.org /10.1093/poq/nfi002
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              Curtin, R., Presser, S., & Singer, E. (2005). Changes in telephone survey nonresponse over the past quarter century. Public Opinion Quarterly, 69(1), 87-98. https://doi.org/10.1093/poq/nfi002.
                 (xsd:string)
              
            
              Curtin, R., S. Presser und E. Singer, 2005: Changes in Telephone Survey Nonresponse over the Past Quarter Century. Public Opinion Quarterly 69: 87-98.
                 (xsd:string)
              
            
              Curtin, R., Singer, E., and Presser, S. (2005). Changes in Telephone Survey Nonresponse Over the Past Quarter Century. Public Opinion Quarterly, 69, 87-98.
                 (xsd:string)
              
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              Curtin, R., Presser, S., Singer, E. (2005). Changes in Telephone Survey Nonresponse over the Past Quarter Century. Public Opinion Quarterly, 69(1), pp. 87-98.
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