Category talk:Buildings and structures on the National Register of Historic Places in Ohio
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Categories:
- NA-Class CE articles
- NA-importance CE articles
- WikiProject Civil engineering articles
- Category-Class National Register of Historic Places articles
- NA-importance National Register of Historic Places articles
- Category-Class National Register of Historic Places articles of NA-importance
- Category-Class United States articles
- NA-importance United States articles
- Category-Class United States articles of NA-importance
- Category-Class Ohio articles
- NA-importance Ohio articles
- WikiProject Ohio articles
- WikiProject United States articles