@article{ref1,
title="The Social and the Extra-Social",
journal="American journal of sociology",
year="1899",
author="Baldwin, J. M.",
volume="4",
number="5",
pages="649-655",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0002-9602",
doi="10.1086/210837",
url="http://dx.doi.org/10.1086/210837"
}