@article{ref1,
title="Studies on the registration and care of socially endangered groups of persons in a district",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1973",
author="Schmidt, F.",
volume="19",
number="5",
pages="378-384",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}