@article{ref1,
title="Occupational hazards and pregnancy",
journal="Akusherstvo i Ginekologiia",
year="1978",
author="Marinova, G.",
volume="17",
number="3",
pages="167-172",
abstract="<p>[Abstract unavailable]</p><p>Language: bg</p>",
language="bg",
issn="0324-0959",
doi="",
url="http://dx.doi.org/"
}