Allbeck, Willard D. A Century of Lutherans in Ohio. Antioch Press, Yellow Springs, OH, 1966. First Edition (No Additional Printings).
Diehl, M[ichael]. Biography of Rev. Ezra Keller, D.D., Founder and First President of Wittenberg College. Springfield, Ohio: 1859. First Edition.
Ernsberger, C. S. A History of the Wittenberg Synod of the General Synod of the Evangelical Lutheran Church 1847-1916. First Edition. Columbus, OH: Lutheran Book Concern, 1917.