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Clay County Archives & Historical Library

Liberty.

Clay County Historical Society & Museum

Liberty, Missouri.

Excelsior Springs Historical Museum

FamilySearch - FamilySearch Center Locator: Clay County

From FamilySearch.org - Find a FamilySearch Center

FamilySearch Catalog

Missouri Local Historical and Genealogical Societies Directory | The State Historical Society of Missouri

Missouri State Archives - County Records on Microfilm - Clay