Please send questions or comments to:
Heterick Memorial Library
Ohio Northern University
525 S. Main Street Ada, OH 45810
Phone: 419-772-2181
Fax: 419-772-1927
E-mail: i-canagaratna@onu.edu
Local History
- Ada Community Centennial, 1853-1953 - Souvenir Program
- Biological Survey (1917) - Ada Sanitation
- Diary of Col.Calvin G. Jackson, M.D.
- History of the Ada Community by Agnew Welsh
- History of the Ada United Methodist Church Celebrating a Century : Reflections of Faith
- Small Town Sampler by Betty Miller, Volumes: I II III IV V VI
- Welcome to the Village of Ada, Ohio
