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New methods in social science research : policy sciences and futures research
Allen, Thomas Harrell, (1978)
Introduction to designing research and evaluation
Drew, Clifford James, (1976)
Qualitative and mixed methods in public health
Padgett, Deborah K., (2012)
Society by agreement : an introduction to sociology
Babbie, Earl R., (1977)
The practice of social research
Babbie, Earl R., (1979)
Survey research methods
Babbie, Earl R., (1973)