- Religions--Early works to 18006
- Scientific expeditions6
- Voyages and travels--Early works to 18006
- Explorers5
- Inscriptions, Hieroglyphic5
- Temples5
- Discoveries in geography.4
- Indians of North America --Canada4
- Mountains4
- Atlases, Dutch3
- Germans --Texas3
- Indians of Mexico3
- Indians of North America --Water rights3
- Lewis and Clark Expedition (1804-1806)3
- Nautical charts.3
- Voyages around the world3
- Water rights --California3
- Water-supply --California3
- Water-supply --Southwest, New3
- Water-supply --Southwestern States3