Barker, Charles, and Gawie de Villiers. “A Philosophical Basis for the Holistic Study of Landscape Development in Geomorphology”. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt; 27, no. 3 (September 16, 2008): 165-182. Accessed May 4, 2024. http://satnt.co.za/index.php/satnt/article/view/215.