@article{ref1,
title="Tolerance of very hot humid environments by highly acclimatized Bantu at rest",
journal="British journal of industrial medicine",
year="1968",
author="Siebert, J. and Heyns, A. J. and Morrison, J. F. and Williams, C. G. and Wyndham, C. H.",
volume="25",
number="1",
pages="22-39",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-1072",
doi="",
url="http://dx.doi.org/"
}