HOWELL, B. Calcareous Algae as index fossils. Journal of Palaeosciences, [S. l.], v. 1, p. 239–240, 1952. DOI: 10.54991/jop.1952.387. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/387. Acesso em: 27 aug. 2024.