Retief, F. and Cilliers, L. (2010) “Astrology and medicine in antiquity and the middle ages”, Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;, 29(1), pp. 1-9. doi: 10.4102/satnt.v29i1.2.