@article{ref1,
title="Number Judgment of Postage Stamps: A Contribution to the Psychology of Social Norms",
journal="Journal of psychology, The",
year="1938",
author="Ansbacher, Heinz",
volume="5",
number="2",
pages="347-350",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0022-3980",
doi="10.1080/00223980.1938.9917575",
url="http://dx.doi.org/10.1080/00223980.1938.9917575"
}