Singh, D., & Chaudhary, F. S. (1986). Theory and analysis of Sample Survey Designs. New Age International.
Παραπομπή Chicago StyleSingh, Daroga, και F S. Chaudhary. Theory and Analysis of Sample Survey Designs. New Delhi: New Age International, 1986.
Παραπομπή MLASingh, Daroga, και F S. Chaudhary. Theory and Analysis of Sample Survey Designs. New Age International, 1986.
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