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1. Declining Response Rates in Federal Surveys: Trends and Implications (hhs.gov)
2. 2011 American Community Survey Internet Tests: Results from First Test in April 2011 (census.gov)
4. Data Quality Assessment of the ACS Internet Response Data (census.gov)
7. 2011 American Community Survey Internet Tests: Results from First Test in April 2011 (census.gov)
9. The Effects of Adding an Internet Response Option to the American Community Survey (census.gov)
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