@article{ref1,
title="Comparison of the job attitudes of personnel in three air traffic control specialties",
journal="Aerospace medicine",
year="1973",
author="Smith, R. C.",
volume="44",
number="8",
pages="918-927",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}