Columbia subject headings:
Bivalves, Fossil--England.
Paleontology--Cretaceous.
Paleontology--England.
Paleontology--Jurassic.
Harvard subject headings:
Bivalves, Fossil--England.
Bivalves, Fossil.
Mollusks, Fossil--England.
Paleontology--Cretaceous
Paleontology--England.
Paleontology--Jurassic
Princeton subject headings:
Bivalves, Fossil.
Paleontology--Cretaceous.
Paleontology--England.
Paleontology--Jurassic.