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2. The conservation of natural resources in the United States
3. The fight for conservation
4. Walnut growing in Oregon
5. The study of corn
6. The rural life problem of the United States: notes of an Irish observer
7. A history of birds
8. Diseases of cultivated plants and trees
9. Soils and manures
10. Fruit-growing in arid regions: an account of approved fruit-growing practices in the inter-mountain country of the western United States
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