SECOND GEOLOGICAL SURVEY OF PENNSYLVANIA - REPORT OF PROGRESS
P. DESCRIPTION OF THE COAL FLORA OF PENNSYLVANIA
AND OF THE
CARBONIFEROUS FORMATION THROUGHOUT THE UNITED STATES
BY LEO LESQUEREUX; ©1879
 Tables of Contents: 
Volume I
 Volume III
Volume II
 Atlas    Index
All Four Volumes:
Scans and Webpage
©George Langford III, 2011

Frontispiece, Volume III
Frontispiece - Volume III of Lesquereux's Coal Flora

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