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| Subject |
|---|
| factive attitudes [1] |
| female [1] |
| fiber [1] |
| field crops [1] |
| fire [2] |
| fire ant control [2] |
| fire investigation [2] |
| firefighter [4] |
| flame retardant [1] |
| flaming / knockdown [2] |
| flea collars [3] |
| flea control [1] |
| forest fires [2] |
| formaldehyde [2] |
| fruits and vegetables [1] |
| funcicide [1] |
| fungicide [1] |