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- Environmental science, 49 science fair projects, Robert L. Bonnet, G. Daniel Keen
- Science fair projects, energy, Bob Bonnet & Dan Keen ; illustrated by Alex Pang
- Botany, 49 science fair projects, by Robert L. Bonnet and G. Daniel Keen
- Science fair projects, chemistry, Bob Bonnet & Dan Keen ; illustrated by Frances Zweifel
- Science fair projects, the environment, Bob Bonnet & Dan Keen ; illustrated by Frances Zweifel
- Science fair projects with electricity & electronics, Bob Bonnet & Dan Keen ; illustrated by Karen McKee
- Earth science, 49 science fair projects, Robert L. Bonnet and G. Daniel Keen
- Science fair projects, the environment, Bob Bonnet & Dan Keen ; illustrated by Frances Zweifel
- Science fair projects, flight, space & astronomy, Bob Bonnet & Dan Keen ; illustrated by Frances Zweifel
- 46 science fair projects for the evil genius, Bob Bonnet, Dan Keen