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Provision of Pen along with Questionnaire Does Not Increase the Response Rate to a Postal Survey: A Randomised Controlled Trial
T. J. Clark, K. S. Khan and J. K. GuptaVolume:
55
Language:
english
Journal:
Journal of Epidemiology and Community Health (1979-)
DOI:
10.2307/25569501
Date:
August, 2001
File:
PDF, 346 KB
english, 2001