@article{ref1,
title="The measurement of work-accident experience in the American petroleum industry",
journal="Industrial medicine and surgery",
year="1970",
author="Greenberg, L.",
volume="39",
number="6",
pages="249-252",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0019-8536",
doi="",
url="http://dx.doi.org/"
}