PRAKASH, G. .; KUMRA, V. K. .; BHASKAR, P. K. . . Air Quality in Agra City: A Geographical Study. National Geographical Journal of India , [S. l.], v. 59, n. 2, p. 37–50, 2022. Disponível em: https://ngji.in/index.php/ngji/article/view/647. Acesso em: 22 jan. 2025.