Estimating Income Variances by Probability Sampling: A Case Study. Pakistan Journal of Commerce and Social Sciences (ISSN 1997-8553), [S. l.], v. 4, n. 2, p. 194–201, 2010. Disponível em: https://jes.ac.pk/index.php/jes/article/view/633. Acesso em: 4 nov. 2025.