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Subject
- Animals--Habitations[remove]14
- Mammals8
- Animals--Food3
- Aspen2
- Beavers2
- Beavers--Behavior2
- Beavers--Environmental aspects2
- Beavers--Habitat2
- Birds--Nests2
- Lakes2
- Mammals--Ecology2
- McTaggart-Cowan, Ian, 1910-20102
- Nest building2
- Scientific expeditions2
- Trees2
- Wolves2
- Wolves--Ecology2
- American pika1
- Animal behavior1
- Animal carcasses1