| 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 |
======================================================== Entered, for the Commonwealth of Pennsylvania, in the year 1884, according to acts of Congress, By WILLIAM A. INGHAM, Secretary of the Board of Commissioners of Geological Survey, In the office of the Librarian of Congress, at WASHINGTON, D.C. ======================================================== ___________________________ Electrotyped and printed by LANE S. HART, State Printer, Harrisburg, Pa. ___________________________________________ |