@article{ref1,
title="New visual standards according to the motor-boat license decree",
journal="Klinische Monatsblätter für Augenheilkunde (1963)",
year="1973",
author="Gramberg-Danielsen, B.",
volume="162",
number="4",
pages="564-565",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0023-2165",
doi="",
url="http://dx.doi.org/"
}