<div class="description">
<dl><dd>"March 1952."</dd>
<dd>At head of title: "EC-21."</dd></dl><br>Subjects: Aphids Control; Insecticides</div>
<div class="fn value">
<dl><dd>Chamberlin, F. S. (Frank Shirley), 1894-</dd>
<dd>United States. Bureau of Entomology and Plant Quarantine</dd></dl></div>
Internet Archive identifier