@article{ref1,
title="What qualities of visual efficiency must be required by the driver of a motor vehicle?",
journal="Klinische Monatsblätter für Augenheilkunde und für augenärztliche Fortbildung",
year="1962",
author="Piper, H. F.",
volume="140",
number="",
pages="405-425",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0344-6360",
doi="",
url="http://dx.doi.org/"
}