@article{ref1,
title="Toward more effective safety measurement systems",
journal="Journal of safety research",
year="1970",
author="Jacobs, H. H.",
volume="2",
number="3",
pages="160-175",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0022-4375",
doi="",
url="http://dx.doi.org/"
}