Beltran, D. G. (1963). A method of determining economical sample size for sample surveys.
Čikaški stil citiranja (17. izdanje)Beltran, Diosdado G. A Method of Determining Economical Sample Size for Sample Surveys. 1963.
MLA način citiranja (9. izdanje)Beltran, Diosdado G. A Method of Determining Economical Sample Size for Sample Surveys. 1963.
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