@article{ref1,
title="Establishing play behaviors in mentally retarded youth",
journal="Rehabilitation literature",
year="1975",
author="Wehman, P.",
volume="36",
number="8",
pages="238-246",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0034-3579",
doi="",
url="http://dx.doi.org/"
}