Columbia subject headings:
Paleontology--Arizona--Guidebooks.
Paleontology--Colorado--Guidebooks.
Paleontology--New Mexico--Guidebooks.
Paleontology--Utah--Guidebooks.
Paleontology--West (U.S.)--Guidebooks.
Harvard subject headings:
Princeton subject headings:
Dinosaurs--Southwestern States--Guidebooks.
Paleontology--Soutwestern States--Guidebooks.