@article{ref1,
title="Improvement of absolute distance estimation underwater",
journal="Perceptual and motor skills",
year="1972",
author="Ferris, S. H.",
volume="35",
number="1",
pages="299-305",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}