@article{ref1,
title="Effects of elementary school physical education upon some aspects of physical, motor, and personality development of boys 12 years of age",
journal="Journal-Lancet",
year="1957",
author="Whittle, H. D.",
volume="77",
number="3",
pages="91-92",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0096-0233",
doi="",
url="http://dx.doi.org/"
}