| LC control no. | n 81112534 |
|---|---|
| Geographic heading | O'Brien County (Iowa) |
| Geographic subdivision usage | Iowa--O'Brien County |
| Variant(s) | O'Brien Co., Iowa |
| Found in | Booth (R. C.) Enterprises, Harlan, Iowa. The ... atlas of O'Brien ... 1946. GeoNames, algorithmically matched, 2009 (adm2; 43°05ʹ00ʺN 095°38ʹ01ʺW) |
| Geographic area code | n-us-ia |
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