@article{ref1,
title="Exclusion area for safety from high-pressure sour gas leaks",
journal="American Industrial Hygiene Association journal",
year="1978",
author="Ledbetter, J. O.",
volume="39",
number="7",
pages="586-592",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8894",
doi="",
url="http://dx.doi.org/"
}