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Improving the quality of shopping center sampling
Sudman, Seymour - 2007
Persistent link: https://www.econbiz.de/10003540395
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Sampling in the twenty-first century
Sudman, Seymour; Blair, Edward - 2007
Persistent link: https://www.econbiz.de/10003540392
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Reducing the cost of surveys
Sudman, Seymour - 1967
Persistent link: https://www.econbiz.de/10013335302