| LC control no. | n 82251810 |
|---|---|
| Geographic heading | Rock Valley (Iowa) |
| Geographic subdivision usage | Iowa--Rock Valley |
| Found in | Dewild, Grant, Reckert & Associates. City of Rock Valley, Iowa, 1978: map recto (Rock Valley) Rand McNally comm. atlas, 1982 (Rock Valley; Sioux Co.) GeoNames, algorithmically matched, 2009 (ppl; 43°12ʹ19ʺN 096°17ʹ42ʺW) |
| Geographic area code | n-us-ia |
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