Pierre D. Thionet. Quelques problemes concemtlnt les sondages. Goettingen : Vandenhoeck & Ruprecht. 1978. 137pp. The Pakistan Development Review, [S. l.], v. 21, n. 1, p. pp.83–84, 2022. DOI: 10.30541/v21i1pp.83-84. Disponível em: https://thepdr.pk/index.php/pdr/article/view/588. Acesso em: 7 jun. 2025.