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Incoming Resources
- Pennsylvania, Joyce Hart and Richard Hantula
- What killed the dinosaurs?, by Isaac Asimov ; with revisions and updating by Richard Hantula
- Michigan, Johannah Haney and Richard Hantula
- Kansas, David C. King, Richard Hantula
- Puerto Rico, Ruth Bjorklund ; Richard Hantula
- Indiana, Kathleen Derzipilski, Richard Hantula
- Wisconsin, Margaret Dornfeld and Richard Hantula
- Is there life in outer space?, by Isaac Asimov ; with revisions and updating by Richard Hantula