@article{ref1,
title="Changes in the topics of depressive psychoses. Study on the cases of 90 years (1880-1971) from the Psychiatric University Clinic Helsinki",
journal="Psychiatrie, Neurologie, und Medizinische Psychologie",
year="1974",
author="Niskanen, P. and Rath, F.",
volume="26",
number="6",
pages="332-343",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0033-2739",
doi="",
url="http://dx.doi.org/"
}