Subject
- Fossils -- Study and teaching -- West (U.S.)1
- Geology -- West (U.S.) -- Periodicals1
- National parks and reserves -- Interpretive programs1
- Paleontology -- West (U.S.) -- Cenozoic1
- Paleontology -- West (U.S.) -- Periodicals1
- United States -- Discovery and Exploration -- Periodicals1
- West (U.S.) -- Description and Travel -- Periodicals1
- West (U.S.) -- Discovery and Exploration -- Periodicals1
- West (U.S.) -- Surveys -- Periodicals1