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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| Descriptors Code | |
| Use | USE |
| UF | Used For |
| NT | Narrow Term |
| BT | Broad Term |
| MT | Main Term |
| RT | Related Term |