@article{ref1,
title="Physical workload in different body postures, while working near to, or below ground level",
journal="Ergonomics",
year="1973",
author="Vos, H. W.",
volume="16",
number="6",
pages="817-828",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-0139",
doi="10.1080/00140137308924573",
url="http://dx.doi.org/10.1080/00140137308924573"
}