@article{ref1,
title="A comparison of the mortality rates of various population groups in the Republic of South Africa",
journal="South African medical journal SAMJ",
year="1979",
author="Wyndham, C. H. and Irwig, L. M.",
volume="55",
number="20",
pages="796-802",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0038-2469",
doi="",
url="http://dx.doi.org/"
}