@article{ref1,
title="Definition of leisure activities and guidance of students during vacation",
journal="Kango kyōiku",
year="1969",
author="Urata, N.",
volume="10",
number="7",
pages="44-46",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0047-1895",
doi="",
url="http://dx.doi.org/"
}