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 - Map of Pennsylvania

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