Cochran, R. M. (1984). The von der Au genealogy: German ancestors and American descendants of Johannes and Elisabeth von der Au of Ernsthofen, Hesse-Darmstadt, Cumberland County, Pennsylvania and Union County, Ohio : including the allied families of Ruhl, Weidman, and Kinnel. [New Concord, Ohio]: R.M. Cochran.

Cochran, Richard M. The Von Der Au Genealogy: German Ancestors and American Descendants of Johannes and Elisabeth Von Der Au of Ernsthofen, Hesse-Darmstadt, Cumberland County, Pennsylvania and Union County, Ohio : Including the Allied Families of Ruhl, Weidman, and Kinnel. [New Concord, Ohio]: R.M. Cochran, 1984.

Cochran, Richard M. The Von Der Au Genealogy: German Ancestors and American Descendants of Johannes and Elisabeth Von Der Au of Ernsthofen, Hesse-Darmstadt, Cumberland County, Pennsylvania and Union County, Ohio : Including the Allied Families of Ruhl, Weidman, and Kinnel. [New Concord, Ohio]: R.M. Cochran, 1984.