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Statistics as Topic -- methods.

Business planning -- Statistical methods.

Sociology, Medical -- methods.

Observation (Educational method)

Case study research : design and methods / Yin, Robert K., author.

Integrating qualitative and quantitative methods : a pragmatic approach / Morgan, David L

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SAGE benchmarks in social research methods

Introducing qualitative methods

The SAGE handbook of innovation in social research methods / Williams, Malcolm, 1953- editor.