@article{ref1,
title="Negro american perception of the irradiation illusion",
journal="Perceptual and motor skills",
year="1963",
author="Pettigrew, Thomas F. and Nuttall, Ronald L.",
volume="17",
number="1",
pages="98-98",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0031-5125",
doi="10.2466/pms.1963.17.1.98",
url="http://dx.doi.org/10.2466/pms.1963.17.1.98"
}