United States National Register of Historic Places |
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Duffy Site
| NRHP ID: 77000485 |
| Wikidata ID: Q5312405 |
| Wikpedia: Duffy site |
| Location (in/near): New Haven, Illinois |
| Listed: 1977-08-26 |
| Role: Site |
| Significance region: National |
| Significance area(s): Prehistoric |
| Criteria: D (information potential) |
Data from United States Park Service and Wikidata