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ADDITIONAL REFERENCES
Proposed Standards and Guidelines for Statistical Surveys, 14 July 2005
Questions and Answers when Designing Surveys for Information Collections.
Developing and Using Questionnaires, October 1993, GAO/PEMD-10.1.7.
Mail and Internet Surveys: The Tailored Design Method, Don A. Dillman, 2000.
U.S. Office of Personnel Management
November 2008