@article{ref1,
title="Photographic evidence and the assassination of president John F. Kennedy",
journal="Journal of forensic sciences",
year="1971",
author="Olson, D. and Turner, R. F.",
volume="16",
number="4",
pages="399-419",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-1198",
doi="",
url="http://dx.doi.org/"
}