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| Hale Farm and Village - WRHS | Bath |
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| Hamilton County Chapter - OGS | Cincinnati |
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| Hamilton's German Village | Hamilton |
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| Hanby House State Memorial | Westerville |
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| Hancock County Chapter-OGS | Findlay |
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| Hancock Historical Museum Association | Findlay |
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| Hanover Township Historcial Society | Hanoverton |
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| Hardin County Chapter - OGS | Kenton |
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| Hardin County Historical Museums | Kenton |
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| Harding Home State Memorial | Marion |
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