@article{ref1,
title="Postgraduate study in child hygiene in the United States and Canada",
journal="American journal of public health",
year="1932",
author="Smith, R. M.",
volume="22",
number="7",
pages="715-720",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}