@article{ref1,
title="Abraham Lincoln as an advocate of improved transportation",
journal="Defense transportation journal",
year="2009",
author="Emerson, Jason",
volume="65",
number="1",
pages="18-20",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0011-7625",
doi="",
url="http://dx.doi.org/"
}