Columbia subject headings:
Harvard subject headings:
Paleontology--Cambrian
Paleontology--China
Smithsonian Institution
Trilobites--Classification.
Trilobites.
Princeton subject headings:
Arthropoda, Fossil--Type specimens.
Paleontology--Cambrian--Catalogs and collections.
Paleontology--China.
Smithsonian Institution.
Trilobites.