<div class="description">
<dl><dd>15 pages ; 25 cm</dd>
<dd>Cover title</dd>
<dd>At head of title: Philadelphia Social Science Association</dd>
<dd>Includes bibliographical references</dd>
<dd>Condition reviewed 20160927</dd>
<dd>digitized. 2018</dd></dl><br>Subjects: Schools; Hygiene; Mental Fatigue</div>
<div class="fn value">
Snyder, M. B., author</div>
Internet Archive identifier