@article{ref1,
title="Meaningfulness and visual recognition threshold",
journal="Perceptual and motor skills",
year="1964",
author="Koplin, James H. and Spielberger, Charles D.",
volume="19",
number="1",
pages="207-210",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0031-5125",
doi="10.2466/pms.1964.19.1.207",
url="http://dx.doi.org/10.2466/pms.1964.19.1.207"
}