@article{ref1,
title="Sex differences in spatial visualization as evidence of sex-linked inheritance",
journal="Perceptual and motor skills",
year="1961",
author="Stafford, Richard E.",
volume="13",
number="3",
pages="428-428",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1961.13.3.428",
url="http://dx.doi.org/10.2466/pms.1961.13.3.428"
}