@article{ref1,
title="Use of random samples in the study of disease and accident states",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1968",
author="Lange, L. and Wolf, F.",
volume="14",
number="8",
pages="580-585",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}