@article{ref1,
title="The Distribution of the Sexes in the United States in 1890",
journal="American journal of sociology",
year="1896",
author="Willcox, W. F.",
volume="1",
number="6",
pages="725-737",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0002-9602",
doi="10.1086/210567",
url="http://dx.doi.org/10.1086/210567"
}