@article{ref1,
title="Safe levels of manual forces for young males (2)",
journal="Applied ergonomics",
year="1977",
author="Davis, P. R. and Stubbs, D. A.",
volume="8",
number="4",
pages="219-228",
abstract="In this, the second of a three-part series in which diagrams show the single loads or forces which can be applied safely by fit young males, data are given for pushing, pulling and vertical lifts, standing, squatting or sitting.<p /> <p>Language: en</p>",
language="en",
issn="0003-6870",
doi="",
url="http://dx.doi.org/"
}