@article{ref1,
title="Etiology and pathogenesis of blindness in the last 30 years",
journal="Zeitschrift fur Arztliche Fortbildung (Jena)",
year="1969",
author="Richter, S. and Linnert, D. and Brüllke, W.",
volume="63",
number="11",
pages="622-623",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-2178",
doi="",
url="http://dx.doi.org/"
}