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DOIs by Historical
| Historical | DOIs |
|---|---|
| Yes | 5,322 |
| No | 156,522 |
| N/A | 2,300 |
| Total | 164,144 |
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| Historical | DOIs |
|---|---|
| Yes | 5,322 |
| No | 156,522 |
| N/A | 2,300 |
| Total | 164,144 |