STOCKMARR, J. Species ldentification of Ulmus Pollen. Danmarks Geologiske Undersøgelse IV. Række, [S. l.], v. 4, n. 11, p. 1–19, 1970. DOI: 10.34194/raekke4.v4.7008. Disponível em: https://geusjournals.org/index.php/raekke4/article/view/7008. Acesso em: 16 may. 2024.