| Defoliants -- Environmental aspects -- United States. Matches 1 item |
| Defoliants -- Social aspects -- United States. Matches 1 item |
| Defoliants -- War use -- United States -- History -- 20th century. Matches 1 item |
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DeForest, John William, 1826-1906. SEE: De Forest, John William, 1826-1906 Matches 1 item
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DeForest, Lee, 1873-1961. SEE: De Forest, Lee, 1873-1961 Matches 2 items
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| DeForest, Lee, 1973-1961. Matches 1 item |
| Deforestation -- Amazon River Region. Matches 3 items |
| Deforestation -- Brazil. Matches 1 item |
| Deforestation -- Control -- Indonesia. Matches 1 item |
| Deforestation -- Control -- Tanzania. Matches 1 item |