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- Conservation of natural resources in literature (5)
- Ecology in literature (5)
- Environmental protection in literature (5)
- Nature in literature (5)
- Outdoor life in literature (5)
- Philosophy of nature in literature (5)
- Wilderness areas in literature (5)
- Forests and forestry in literature (4)
- Landscape in literature (4)
- American literature--History and criticism (2)
- American literature--History and criticism--Theory, etc (2)
- Criticism--Great Britain (2)
- Criticism--United States (2)
- Ecocriticism (2)
- English literature--History and criticism (2)
- English literature--History and criticism--Theory, etc (2)
- Ecocriticism--Great Britain (1)
- Environmentalism--Great Britain (1)
- Forests in literature (1)
- Landscapes in literature (1)