VERMA, K.; RAI, V. . Changes in Occupational Structure of Population in Ballia district: A Geographical study. National Geographical Journal of India , [S. l.], v. 66, n. 2, p. 136–149, 2022. Disponível em: https://ngji.in/index.php/ngji/article/view/4. Acesso em: 22 dec. 2024.