@article{ref1,
title="Tornado cloud seen in alaska",
journal="Science",
year="1940",
author="Rockie, W. A.",
volume="91",
number="2351",
pages="71-71",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0036-8075",
doi="10.1126/science.91.2351.71",
url="http://dx.doi.org/10.1126/science.91.2351.71"
}