@article{ref1,
title="Playfulness: an attempt to conceptualize a quality of play and of the player",
journal="Psychological reports",
year="1966",
author="Lieberman, J. Nina",
volume="19",
number="Suppl",
pages="1278-1278",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0033-2941",
doi="10.2466/pr0.1966.19.3f.1278",
url="http://dx.doi.org/10.2466/pr0.1966.19.3f.1278"
}