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Incoming Resources
- The Erie Canal,, by the editors of American heritage. Author: Ralph K. Andrist. Consultant: Carter Goodrich
- The California gold rush,, by the editors of American heritage. Narrative by Ralph K. Andrist, in consultation with Archibald Hanna
- To the Pacific with Lewis and Clark,, by the editors of American heritage. Author: Ralph K. Andrist. Consultant: Edwin R. Bingham
- Steamboats on the Mississippi,, by the editors of American heritage. Narrative by Ralph K. Andrist, in consultation with C. Bradford Mitchell