Breuning-Madsen, H. (1989) “Paul A. Delcourt, Hazel R. Delcourt: Longterm forest dynamics of the Temperate Zone: a case study of late-quaternary forests in Eastern North America. (Ecological studies, vol. 63.)”, Geografisk Tidsskrift, 89. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/44712 (Set: 4 maj 2024).