@article{ref1,
title="On the Relative Value of Maternal and Fœtal Life",
journal="Provincial medical and surgical journal (1844)",
year="1852",
author="Collyns, Wm.",
volume="16",
number="24",
pages="621-622",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="2041-997X",
doi="",
url="http://dx.doi.org/"
}