@article{ref1,
title="Attention and manipulative play in the one-year-old child",
journal="Child development",
year="1974",
author="Fenson, L. and Sapper, V. and Minner, D. G.",
volume="45",
number="3",
pages="757-764",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0009-3920",
doi="",
url="http://dx.doi.org/"
}