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| Kappa Kappa Gamma Foundation | Columbus |
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| Kelleys Island Historical Association Inc | Kelleys Island |
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| Kelton House Museum and Garden | Columbus |
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| Kent Historical Society | Kent |
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| Kent State University | Kent |
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| Kent State University Museum | Kent |
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| Kettering-Moraine Museum & Historical Society | Kettering |
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| Kidron Community Historical Society | Kidron |
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| Killbuck Valley Historical Society | Killbuck |
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| Kinsman Historical Society | Kinsman |
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