@article{ref1,
title="Mass morbidity and occupational poisoning of workers in Petersburg in 1914 and their assessment by physicians",
journal="Gigiena Truda i Professional'nye Zabolevaniia",
year="1967",
author="Beĭlikhis, G. A.",
volume="11",
number="3",
pages="38-40",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9919",
doi="",
url="http://dx.doi.org/"
}