@article{ref1,
title="The earthquakes of 1934 and 1935 in northwestern Illinois and adjacent parts of Iowa",
journal="Bulletin of the Seismological Society of America",
year="1940",
author="Fryxell, F. M.",
volume="30",
number="3",
pages="213-218",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0037-1106",
doi="",
url="http://dx.doi.org/"
}