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Multiple scaling : the theory and application of partial order scalogram analysis
Shye, Samuel, (1985)
Scaling methods
Dunn-Rankin, Peter, (2004)
Scaling procedures : issues and applications
Netemeyer, Richard G., (2003)
Interviewing : strategy, techniques, and tactics
Gorden, Raymond L., (1975)
Gorden, Raymond L., (1969)