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River cutters : grades 6-9 : teacher's guide
- "Matériel didactique"
- "Juvenile works"@en
- "Problems and exercises"@en
- "River cutters : grades 6-9, skills, concepts, themes, nature of science and mathematics, time"
- "River cutters : grades 6-9 : teacher's guide"@en
- "River cutters : grades 6-9"@en