@article{ref1,
title="Safety at extreme altitudes: the 1995 American North Ridge Everest Expedition",
journal="Wilderness and environmental medicine",
year="1996",
author="Litch, J. A.",
volume="7",
number="3",
pages="259-260",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1080-6032",
doi="",
url="http://dx.doi.org/"
}