Lewis and Clark
- Explora Public
- Explora Primary
- Funk & Wagnalls New World Encyclopedia
- MasterFILE Complete
- MyHeritage Library Edition
- Primary Search
- WorldCat
- Discovering Lewis & Clark
- Journals of the Lewis and Clark Expedition
- Lewis and Clark Expedition
- Lewis and Clark Mapping the West
- Lewis and Clark Trail Guide
- Lewis and Clark: The National Bicentennial Exhibition online exhibition designed to let people follow in the footsteps of the expedition
- Mouth of the Platte, Inc. A chapter of the Lewis and Clark Trail Heritage Foundation serving the Nebraska-Iowa ar
- National Geographic: Lewis and Clark
- National Park Service Lewis and Clark National Historic Trail comprehensive website
- Nebraska Studies
- PBS Online - Lewis & Clark