@article{ref1,
title="Effect of underwater breathing apparatus and absolute air pressure on divers' ventilatory capacity",
journal="Aerospace medicine",
year="1972",
author="Morrison, J. B. and Butt, W. S.",
volume="43",
number="8",
pages="881-886",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}