@article{ref1,
title="7-year plan and prevention of trauma in coal industry",
journal="Ortopediia travmatologiia i protezirovanie",
year="1960",
author="Dvorkin, A. M.",
volume="21",
number="",
pages="63-67",
abstract="<p>[Abstract unavailable]</p> <p>Language: ru</p>",
language="ru",
issn="0030-5987",
doi="",
url="http://dx.doi.org/"
}