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Jan. 29, 2015

Collecting survey data | Pew Research Center

http://www.pewresearch.org/methodology/u-s-survey-research/collecting-survey-data/

... especially those that cover more sensitive topics. ... the Cell Phone Challenge
May 20, 2010; Accurately Locating ... on Cell Phones and Polling May 22 ...

Jan. 28, 2011

Cell Phone Surveys | Pew Research Center

http://www.people-press.org/methodology/collecting-survey-data/cell-phone-surveys/

... questions, especially those that cover more sensitive topics. ... Assessing the
Cell Phone Challenge May 20, 2010; ... on Cell Phones and Polling May 22 ...

Jan. 28, 2011

Cell Phones | Pew Research Center

http://www.people-press.org/methodology/sampling/cell-phones/

... dedicated a special issue to the topic of cell ... 2010; Assessing the Cell Phone
Challenge May 20, 2010; ... Findings on Cell Phones and Polling May 22 ...