<div class="description">
<dl><dd>Thesis (Ph. D.)--University of Chicago, 1911</dd>
<dd>Bibliographical foot-notes</dd></dl><br>Subjects: Geology, Stratigraphic -- Pleistocene; Geology -- Iowa Warren County</div>
<div class="fn value">
Tilton, John Littlefield, b. 1863</div>
Internet Archive identifier