@article{ref1,
title="Present day epidemiology in civil aviation",
journal="Journal of Tropical Medicine and Hygiene",
year="1972",
author="Turner, A. L.",
volume="75",
number="12",
pages="245 passim-245 passim",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-5304",
doi="",
url="http://dx.doi.org/"
}