@article{ref1,
title="Models of children's play",
journal="Mental hygiene",
year="1952",
author="Peller, L. E.",
volume="36",
number="1",
pages="66-83",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0025-9683",
doi="",
url="http://dx.doi.org/"
}