@article{ref1,
title="Drug and toxic hazrds in general aviation. AM-68-16",
journal="AM reports",
year="1968",
author="Dille, J. R. and Mohler, S. R.",
volume="",
number="",
pages="1-7",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1545-1518",
doi="",
url="http://dx.doi.org/"
}