National Roads Requirements. The Pakistan Development Review, [S. l.], v. 32, n. 4I, p. pp.663–673, 1993. DOI: 10.30541/v32i4IIpp.663-673. Disponível em: https://thepdr.pk/index.php/pdr/article/view/1170. Acesso em: 13 dec. 2025.