@article{ref1,
title="Demography. Killing the sex ratio",
journal="Nature",
year="1994",
author="Judson, O. P.",
volume="372",
number="6506",
pages="503-504",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="10.1038/372503a0",
url="http://dx.doi.org/10.1038/372503a0"
}