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The Research Division of the Oklahoma Historical Society is the repository of books, archival materials, and family research records about Oklahoma and its people. Since 1893 the collections have grown to 30 million pages of newspapers, 4 million documents on Indian history, 6,000 manuscript collections, 3 million photographs, 10,000 maps, and vital statistics on families that range from U.S. Census records to cemetery and county records for most counties in the state. If a person is trying to build their family tree, a visit to the OHS Research Division is the place to start.