Vooys, R., Cilliers, S., Berner, J. and Breytenbach, W. (2014) “Condition of Potchefstroom historic oak avenue: An ecological approach”, Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;, 33(1), p. 1 bladsy. doi: 10.4102/satnt.v33i1.1232.