@article{ref1,
title="Modified Mercalli intensity scale of 1931",
journal="Bulletin of the Seismological Society of America",
year="1931",
author="Wood, Harry O. and Neumann, Frank",
volume="21",
number="4",
pages="277-283",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0037-1106",
doi="",
url="http://dx.doi.org/"
}