@article{ref1,
title="A conspectus of research on vitamin A requirements of man",
journal="Journal of nutrition",
year="1972",
author="Rodriguez, M. S. and Irwin, M. I.",
volume="102",
number="7",
pages="909-968",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-3166",
doi="",
url="http://dx.doi.org/"
}