@article{ref1,
title="Volcanic action in the black hills of south dakota",
journal="Science",
year="1912",
author="Darton, N. H.",
volume="36",
number="931",
pages="602-603",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0036-8075",
doi="10.1126/science.36.931.602",
url="http://dx.doi.org/10.1126/science.36.931.602"
}