@article{ref1,
title="Self-concept, sports interests, sports participation, and body type of seventh- and eighth-grade boys",
journal="Journal of psychology, The",
year="1971",
author="Felker, D. W. and Kay, R. S.",
volume="78",
number="2d Half",
pages="223-228",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-3980",
doi="",
url="http://dx.doi.org/"
}