Columbia subject headings:
Paleontology--Cambrian.
Paleontology--Newfoundland and Labrador--Handbooks, manuals, etc.
Paradoxides.
Harvard subject headings:
Paleontology--Cambrian
Paleontology--Newfoundland--Manuels.
Paradoxides.
Princeton subject headings:
Paleontology--Cambrian.
Paleontology--Newfoundland--Manuels.
Paradoxides.