@article{ref1,
title="Individual and Social Factors in the Development of Graphic Symbolization",
journal="Journal of psychology, The",
year="1938",
author="Cameron, Norman",
volume="5",
number="1",
pages="165-184",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0022-3980",
doi="10.1080/00223980.1938.9917561",
url="http://dx.doi.org/10.1080/00223980.1938.9917561"
}