DR. SANJAY KUMAR SINGH AND HEMANT KUMAR VERMA. Geographical analysis of the problem of water runoff and dirty water disposal of Gorakhpur city. International journal of economic perspectives, [S. l.], v. 16, n. 5, p. 171–177, 2022. Disponível em: http://www.ijeponline.org/index.php/journal/article/view/225. Acesso em: 15 apr. 2026.