Biodiversity Heritage Library
On the fossil foot-marks in the red sandstone of Pottsville, Pennsylvania / by Isaac Lea.
By: Lea, Isaac, - American Philosophical Society.
Publication info: Philadelphia :Printed for the author,1852.
Contributed by: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Subjects: Dinosaurs Footprints, Fossil Paleontology Pennsylvania Pottsville