@article{ref1,
title="Observations and thoughts about the earthquake and its aftermath",
journal="Transactions and studies of the College of Physicians of Philadelphia",
year="1990",
author="",
volume="12",
number="1",
pages="1-3",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0010-1087",
doi="",
url="http://dx.doi.org/"
}