@article{ref1,
title="Attitudes and motivations of test pilots",
journal="United States Armed Forces medical journal",
year="1957",
author="Johnson, L. Clark",
volume="8",
number="5",
pages="718-724",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0566-0777",
doi="",
url="http://dx.doi.org/"
}