Marga Coesèl, Frederik Willem van Eeden. Pionier van de natuurbescherming. Heimans en Thijsse Reeks 4. BMGN - Low Countries Historical Review, [S. l.], v. 135, 2020. DOI: 10.18352/bmgn-lchr.10830. Disponível em: https://ojstest.minions.amsterdam/article/view/7068.. Acesso em: 22 dec. 2024.