@article{ref1,
title="The Detection of Colour-blindness from a Practical Point of View",
journal="Proceedings of the Royal Society of Medicine",
year="1930",
author="Edridge-Green, F. W.",
volume="24",
number="1",
pages="48-52",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0035-9157",
doi="",
url="http://dx.doi.org/"
}