@article{ref1,
title="On the principal constructions of breech-loading mechanism for small arms, and their relative mechanical advantages - 2",
journal="Proceedings of the institution of mechanical engineers",
year="1871",
author="Marshall, William P.",
volume="22",
number="1",
pages="293-297",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0020-3483",
doi="10.1243/PIME_PROC_1871_022_025_02",
url="http://dx.doi.org/10.1243/PIME_PROC_1871_022_025_02"
}