@article{ref1,
title="Environmental health",
journal="Tropical diseases bulletin",
year="1975",
author="",
volume="72",
number="1",
pages="21-22",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0041-3240",
doi="",
url="http://dx.doi.org/"
}