@article{Vorster_1, title={Dr Alexander Robert Pettigrew Walker (13 September 1913 - 21 May 2007)}, volume={20}, url={http://sajcn.redbricklibrary.com/index.php/SAJCN/article/view/181}, number={2}, journal={South African Journal of Clinical Nutrition}, author={Vorster, H}, year={1}, month={1} }