@article{ref1,
title="Football injuries of the Harvard squad for three years under the revised rules: 1909",
journal="Clinical orthopaedics and related research",
year="2003",
author="Nichols, Edward H. and Richardson, Frank L.",
volume="",
number="409",
pages="3-10",
abstract="unavailable.  Keywords: American football",
language="en",
issn="0009-921X",
doi="10.1097/01.blo.0000058449.55207.13",
url="http://dx.doi.org/10.1097/01.blo.0000058449.55207.13"
}