KULLBERG, J. C.; ROCHA, R. B.. Preamble. Ciências da Terra / Earth Sciences Journal, [S.l.], v. 19, n. 1, p. 5-7, sep. 2017. ISSN 2183-4431. Available at: <http://cienciasdaterra.novaidfct.pt/index.php/ct-esj/article/view/346>. Date accessed: 24 oct. 2020. doi: https://doi.org/10.21695/cterra/esj.v19i1.346.