On the Fossil Foot-Marks in the Red Sandstones of Pottsville, Schuylkill County, Penna
Published in Transactions of the American Philosophical Society, in 1853, in volume 10, pages 307-317
Date published:1853
Published in Transactions of the American Philosophical Society, in 1853, in volume 10, pages 307-317
Date published:1853