@article{ref1,
title="Facial fractures and their treatment. 1. Types, etiology and prevalence of facial bone injuries",
journal="Zahntechnik; Zeitschrift für Theorie und Praxis der wissenschaftlichen Zahntechnik",
year="1972",
author="Andrä, A.",
volume="13",
number="8",
pages="357-359",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0513-7926",
doi="",
url="http://dx.doi.org/"
}