FINCHAM, J. E.; NUPEN, P. A Pied Crow Corvus albus survey covering 4 000 km2 of the Karoo: Autumn 2015. Biodiversity Observations, [S. l.], v. 7, p. 1–4, 2016. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/295. Acesso em: 4 jul. 2022.