DE SWARDT, D. H. Living in isolation - observations on African Rock Pipits in the Northern Cape. Biodiversity Observations, [S. l.], v. 8, p. 13: 1 – 6, 2017. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/411. Acesso em: 7 jul. 2022.