@article{ref1,
title="Violence During Pregnancy and Substance Abuse",
journal="American journal of public health",
year="1990",
author="Amaro, Hortensia and Fried, Lise E. and Cabral, Howard////",
volume="80",
number="2",
pages="575-579",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}