@article{ref1,
title="How NIOSH views the question of industrial head protection",
journal="Occupational health and safety",
year="1979",
author="Cook, W. I.",
volume="48",
number="2",
pages="53-54",
abstract="Abstract unavailable.",
language="",
issn="0362-4064",
doi="",
url="http://dx.doi.org/"
}