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surveys--methodology

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Cover of How to Measure Survey Reliability and Validity (Survey Kit, Vol 7) by mark s. litwin

How to Measure Survey Reliability and Validity (Survey Kit, Vol 7)

By Mark S. Litwin

Análisis de datos de encuestas

Análisis de datos de encuestas

By Vidal Díaz de Rada

Cover of Survey methodology by robert m. groves

Survey methodology

By Robert M. Groves