LANG, W. H. Note on the interest on Annular Xylem in the Psilophytales. Journal of Palaeosciences, [S. l.], v. 1, p. 295–297, 1952. DOI: 10.54991/jop.1952.402. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/402. Acesso em: 14 may. 2024.