The construction of a rugby player index for the successful evaluation of rugby players - le Roux, S.; Henning, E.; Kleynhans, M.; Terblanche, H.C.; Crafford, D.; Grobbelaar, C.; Wood, P.S.; Grant, C.C.; Janse van Rensburg, D.C.; Kruger, P.E.; du Toit, P.J. (Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / South African Journal of Science and Technology, 2014)