@article{ref1,
title="Poisonous Gases in Warfare",
journal="Boston medical and surgical journal",
year="1920",
author="Butler, CS",
volume="182",
number="",
pages="133-134",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0096-6762",
doi="",
url="http://dx.doi.org/"
}