@article{ref1,
title=""Bullet hole" in an ancient South Dakota skull, or a trephination?",
journal="Plains anthropologis",
year="1984",
author="Gregg, J. B. and Bass, W. M.",
volume="29",
number="106",
pages="321-326",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0032-0447",
doi="",
url="http://dx.doi.org/"
}