@article{ref1,
title="Arrow poison of South African Bushmen",
journal="South African medical journal SAMJ",
year="1957",
author="Bijlsma, U. G. and De waard, F.",
volume="31",
number="6",
pages="115-118",
abstract="<p>[Abstract unavailable]</p><p>Language: af</p>",
language="af",
issn="0038-2469",
doi="",
url="http://dx.doi.org/"
}