LEWIS & CLARK WEBSITES
1. http://www.lewis-clark.org/
2. http://www.pbs.org/lewisandclark/
3. http://www.nationalgeographic.com/lewisandclark/
4. http://www.sierraclub.org/lewisandclark/
5. http://www.edgate.com/lewisandclark/
6. http://www.lewisclark.net/