WILLIAMS, D. M. Bird population trends in a patch of temperate forest on the Drakensberg escarpment, Mpumalanga. Biodiversity Observations, [S. l.], v. 7, p. 1–4, 2016. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/298. Acesso em: 1 jul. 2022.