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Thinking about answers : the application of cognitive processes to survey methodology / Seymour Sudman, Norman M. Bradburn, Norbert Schwarz.
- 300.723 S9438t
- Sudman, Seymour,
- Jossey-Bass Publishers,
- [1996] ©1996
- San Francisco :
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Applied sampling / Seymour Sudman.
- 519.52 S9438
- Sudman, Seymour,
- Academic Press,
- New York :
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Asking questions / Seymour Sudman, Norman M. Bradburn.
- 300.723 S9438a
- Sudman, Seymour,
- Jossey-Bass Publishers,
- San Francisco :