@article{ref1,
title="Etiological factors in mental retardation: a study of 470 cases",
journal="Indian pediatrics",
year="1972",
author="Sinclair, S.",
volume="9",
number="7",
pages="391-396",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0019-6061",
doi="",
url="http://dx.doi.org/"
}