@article{ref1,
title="Yale studies in ambulatory medical care. v. determinants of use of hospital emergency services",
journal="American journal of public health",
year="1966",
author="Weinerman, E. R. and Ratner, RS and Robbins, A. and Lavenhar, M. A.",
volume="56",
number="7",
pages="1037-1056",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}