@article{ref1,
title="Absolute and relational responding on an intermediate size transposition task with first-grade children",
journal="Journal of genetic psychology",
year="1972",
author="Weinstock, A.",
volume="121",
number="1st Half",
pages="41-47",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-1325",
doi="",
url="http://dx.doi.org/"
}