Bechhofer, Frank
Principles of research design in the social sciences
Routledge, 2000
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Sjoberg, Gideon
A methodology for social research
Harper & Row Publishers, 1968
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Methodology of social science research
edited by Sugata Dasgupta
Impex India, 1967
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Research methods in social relations
by Claire Selltiz ... [and others]
Methuen, 1965
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Marshall, Catherine
Designing qualitative research
Sage, 1999
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