@article{ref1,
title="Total or selective toxicology",
journal="South African medical journal SAMJ",
year="1977",
author="",
volume="52",
number="7",
pages="255-256",
abstract="<p>[Abstract unavailable]</p><p>Language: af</p>",
language="af",
issn="0038-2469",
doi="",
url="http://dx.doi.org/"
}