@article{ref1,
title="Causes of blindness in Nigeria--a study of 1,000 hospital patients",
journal="West African medical journal and Nigerian medical and dental practitioner",
year="1973",
author="Olurin, O.",
volume="22",
number="6",
pages="?97-107",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0189-0565",
doi="",
url="http://dx.doi.org/"
}