@article{ref1,
title="Progress of American industrial medicine in the first half of the Twentieth Century",
journal="American journal of public health",
year="1952",
author="Legge, R. T.",
volume="42",
number="8",
pages="905-912",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}