| 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 |
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All Four Volumes: Scans and Webpage ©George Langford III, 2011 |
SECOND GEOLOGICAL SURVEY OF PENNSYLVANIA : REPORT OF PROGRESS. P. ============== DESCRIPTION OF THE COAL FLORA OF THE CARBONIFEROUS FORMATION IN PENNSYLVANIA AND THROUGHOUT THE UNITED STATES. ________________ VOL. III. ________________ BY LEO LESQUEREUX. _________________________ HARRISBURG : PUBLISHED BY THE BOARD OF COMMISSIONERS FOR THE SECOND GEOLOGICAL SURVEY. 1884. |