@article{ref1,
title="Social class and perceptual learning",
journal="Mental hygiene",
year="1966",
author="Jensen, A. R.",
volume="50",
number="2",
pages="226-239",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0025-9683",
doi="",
url="http://dx.doi.org/"
}