@article{ref1,
title="Designing warning signs and warning labels: Part II -- Scientific basis for initial guidelines",
journal="International journal of industrial ergonomics",
year="1992",
author="Lehto, Mark R.",
volume="10",
number="1-2",
pages="115-138",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0169-8141",
doi="",
url="http://dx.doi.org/"
}