Delaware CountyThe History of Delaware County, Iowa...Chicago: Western Hist. Co., 1878. - index online*
Biographical Souvenir of the Counties of Delaware and Buchanan...[?]: F. A. Battey & Co., 1890.
History of Delaware County, Iowa...Captain John F. Merry, supervising ed. 2 vols. Chicago: S. J. Clarke Pub. Co., 1914. - index, 9 bios online
Stories of the Beginning of Delaware County [1834-1870]...Written for the Youth of Today...by Belle Bailey. 2 vols. Manchester: Author, 1932-1935.