@article{ref1,
title=""There is nothing so practical as a good theory"",
journal="Child welfare",
year="1986",
author="Polansky, N. A.",
volume="65",
number="1",
pages="3-15",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0009-4021",
doi="",
url="http://dx.doi.org/"
}