BHARDWAJ, D.; VENKATACHALA, B. Microfloristic Evidence on the boundary between the Carboniferous and the Permian systems in Pfalz (W. Gwemany). Journal of Palaeosciences, [S. l.], v. 6, n. (1-2), p. 1–11, 1957. DOI: 10.54991/jop.1957.546. Disponível em: https://www.jpsonline.co.in/index.php/jop/article/view/546. Acesso em: 21 may. 2024.