@article{ref1,
title="Card Test for Colour-blindness",
journal="Proceedings of the Royal Society of Medicine",
year="1920",
author="Edridge-Green, F. W.",
volume="13",
number="Sect Ophthalmol",
pages="62-63",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0035-9157",
doi="",
url="http://dx.doi.org/"
}