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Evaluation : a systematic approach / Peter H. Rossi, Howard E. Freeman.
- 361.61072 R831 1989
- Rossi, Peter H. 1921-2006,
- Sage Publications,
- Newbury Park, California :
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Participant observation : a methodology for human studies / Danny L. Jorgensen.
- 300.72 J826
- Jorgensen, Danny L.
- Sage Publications,
- c1989.
- Newbury Park, California :
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Telephone survey methods : sampling, selection, and supervision / Paul J. Lavrakas.
- 300.723 L4147 1993
- Lavrakas, Paul J.,
- Sage Publications,
- Newbury Park, California :