@article{ref1,
title="Spectacles and contact lenses: a survey of military trainees",
journal="Military medicine",
year="1972",
author="Rengstorff, R. H.",
volume="137",
number="1",
pages="13-14",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0026-4075",
doi="",
url="http://dx.doi.org/"
}