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Part 4: Wildcard
| Code | Significance | N |
|---|---|---|
| D | Dispense → Regardless of other factors (i.e. truly obsolete). | |
| N | None → No wildcard assigned. | |
| K | Keeper -> Keeper → A book with a special Northwest (or Mountaineers) connection. | |
| M | Published by Mountaineers Books (including Braided River and Skipstone imprints). |
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