@article{ref1,
title="Comments on the article "Principles of the classification of jobs according to the degree of severity, harmfulness and danger" (E. N. Marchenko, I. S. Kandror, L. S. Rozanov)",
journal="Gigiena Truda i Professional'nye Zabolevaniia",
year="1973",
author="Smetanin, N. I.",
volume="17",
number="4",
pages="60-60",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0016-9919",
doi="",
url="http://dx.doi.org/"
}