Output Effects of Tubewells on the Agriculture of the Punjab: Some Empirical Results. The Pakistan Development Review, [S. l.], v. 10, n. 1, p. pp.68–87, 2022. DOI: 10.30541/v10i1pp.68-87. Disponível em: https://thepdr.pk/index.php/pdr/article/view/267. Acesso em: 8 jun. 2025.