@article{ref1,
title="Traffic Signs for Colour-Blind",
journal="British medical journal: BMJ",
year="1964",
author="Pickard, JW",
volume="2",
number="541",
pages="1141-1141",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}