@article{ref1,
title="Results of the youth project "hygiene-complex practical work" 1975-1976",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1977",
author="Franzen, E. and Karsdorf, G.",
volume="23",
number="11",
pages="812-819",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}