@article{ref1,
title="Engineering data needed on earthquake motion for use in the design of earthquake-resisting structures",
journal="Bulletin of the Seismological Society of America",
year="1930",
author="Freeman, John R.",
volume="20",
number="2",
pages="67-87",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0037-1106",
doi="",
url="http://dx.doi.org/"
}