@article{ref1,
title="A national study of child development (NCDS 1958 cohort). Preliminary findings in a national sample of 11-year-old children",
journal="Proceedings of the Royal Society of Medicine",
year="1973",
author="Peckham, C. S.",
volume="66",
number="7",
pages="701-703",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0035-9157",
doi="",
url="http://dx.doi.org/"
}