Armitage, P.
Statistical methods in medical research
Blackwell Scientific Publication, 1985
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Munro, Barbara Hazard
Statistical methods for health care research
Lippincott Williams & Wilkin , 2005
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Merrill, Ray M.
Statistical methods in epidemiologic research
Jones & Bartlett Learning, 2016
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Alston, Margaret
Research for social workers : an introduction to methods
Allen & Unwin, 1998
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Snedecor, George W.
Statistical methods
Iowa State University Press, 1989
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