<div class="description">
<p>vol. I. Laurentian, Huronian, Cambrian and Lower Silurian formations, J. P. Lesley.--vol. II. Upper Silurian and Devonian formations, by J. P. Lesley.--vol. III, pt I. Carboniferous formation, by J. P. Lesley., E. V. d'Invilliers, and the New Red of Bucks and Montgomery counties, by B. S. Lyman
</p>
<br>Subjects: Geology -- Pennsylvania; Geology, Stratigraphic -- Paleozoic; Coal -- Pennsylvania</div>
<div class="fn value">
<dl><dd>Pennsylvania. Geological survey (2d : 1874-1890)</dd>
<dd>Ingham, William Armstrong, 1827-1913</dd></dl></div>
Internet Archive identifier