@article{ref1,
title="The Gesell Developmental Schedules: Arnold Gesell (1880-1961)",
journal="Journal of abnormal child psychology",
year="1977",
author="Ball, R. S.",
volume="5",
number="3",
pages="233-239",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0091-0627",
doi="",
url="http://dx.doi.org/"
}