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Realism in the classification and use of research personnel in public mental health services
Dörken, Herbert, (1972)
Making sense out of utilization data
Hershey, John C., (1975)
Public opinions about public welfare
Ogren, Evelyn H., (1973)
Commercial uses of sampling
Stock, J. Stevens, (1947)
Personal follow-up in a mail survey : its contribution and its cost
Hochstim, Joseph R., (1970)