Incoming Resources
- Lives of the explorers, discoveries, disasters (and what the neighbors thought), Kathleen Krull ; illustrated by Kathryn Hewitt
- Lives of the explorers, discoveries, disasters (and what the neighbors thought), Kathleen Krull ; illustrated by Kathryn Hewitt
- Explorers of the remotest places on earth, by Nel Yomtov
- Explorers of the deepest places on Earth, by Peter Mavrikis
- Imperfect union, how Jessie and John Frémont mapped the West, invented celebrity, and helped cause the Civil War, Steve Inskeep