@article{ref1,
title="Occupational health activities in public health practice",
journal="American journal of public health",
year="1963",
author="Merrill, MH",
volume="53",
number="",
pages="1877-1882",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}