HELMSTAEDT, Herwart. Note on Plant Fossils from Beaver Harbour, N. B. Atlantic Geoscience, [S. l.], v. 3, n. 4, 1967. DOI: 10.4138/1554. Disponível em: https://journals.lib.unb.ca/index.php/ag/article/view/1554. Acesso em: 1 may. 2024.