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2by Machin, David, 1939-Subjects: “...Research Design....”
Published 2010
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3by Fayers, Peter M.Subjects: “...Research Design. https://id.nlm.nih.gov/mesh/D012107...”
Published 2000
Quality of life (Online)
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4Subjects: “...Research Design. (DNLM)D012107...”
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