SAHNI, B. . Note on some possible psilophyte remains from Spiti, North-West Himalayas. Journal of Palaeosciences, [S. l.], v. 2, p. 1–3, 1953. DOI: 10.54991/jop.1953.424. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/424. Acesso em: 18 may. 2024.