@article{ref1,
title="Social class and season of birth",
journal="Journal of biosocial science",
year="1971",
author="James, W. H.",
volume="3",
number="3",
pages="309-320",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9320",
doi="",
url="http://dx.doi.org/"
}