M. S.CHAUDHRY. RATIO ESTIMATORS FOR POPULATION VARIANCE IN ADAPTIVE CLUSTER SAMPLING. Pakistan Journal of Science, [S. l.], v. 68, n. 3, 2023. DOI: 10.57041/vol68iss3pp%p. Disponível em: http://pjosr.com/index.php/pjs/article/view/526. Acesso em: 18 apr. 2026.