@article{ref1,
title="Safety in health education: some precautions",
journal="Journal of school health",
year="1974",
author="Thygerson, A. L.",
volume="44",
number="9",
pages="508-510",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-4391",
doi="",
url="http://dx.doi.org/"
}