1858 Dinosaur Tracks Ichnology Hitchcock
Paul D Stewart
1858 Appleton Cabinet Ichnology Hitchcock
Paul D Stewart
Fossil Dinosaur Track
Paul D Stewart
First Fossil Dinosaur Tracks
Paul D Stewart
Fossilized Traces Of Invertebrates
Sinclair Stammers/science Photo Library
Mammoth Fossil Footprint Excavation
Marco Ansaloni / Science Photo Library
Sloth Skin And Mammal Fossil Footprints
Michael Long/science Photo Library
Eurypterid Track
Sinclair Stammers
Fossil Dinosaur Track #1
Paul D Stewart
Appleton Cabinet Of Dinosaur Tracks
Paul D Stewart
Worm Track Fossils
Sinclair Stammers/science Photo Library
Edward Hitchcock, Us Geologist
Science, Industry & Business Librarynew York Public Library