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front
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|review
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Cartwright A. 1983 Health survey in practive and in potential. Cochran W.G. 1977 Sampling techniques. Kish L. 1965 Survey Sampling. Kraemer H.C.,Thiemann S. 1987 How many subjects?. Levi P.S., Lemeshow S. 1980 Sampling for the health professional. Lwanga S.K. Lemeshow S. 1991 Sample size determination in health studies. Warwick D.P.,Lininger C.A. 1975 The sample survey: theory and practice. |