Columbia subject headings:
Harvard subject headings:
Paleontology--Cenozoic--Guidebooks.
Paleontology--Mesozoic--Guidebooks.
Paleontology--West (U.S.)--Guidebooks.
Vertebrates, Fossil--West (U.S.)--Guidebooks.
West (U.S.)--Guidebooks.
Princeton subject headings:
Paleontology--Cenozoic--Guidebooks.
Paleontology--Mesozoic--Guidebooks.
Paleontology--West (U.S.)--Guidebooks.
Vertebrates, Fossil--West (U.S.)--Guidebooks.
West (U.S.)--Guidebooks.