You are asking a question of the Google Community not the staff or management of the Ohio Dept. Of Vital Statistics. I would call an ask them. However, I feel this would fall under the Franklin County Coroner's Office or whatever county your Mom passed away in. I seriously doubt anyone is going to have an autopsy report from over 50 years ago.
you would have to obtain the autopsy from the county coroner's office, where she died.
Thanks! Your answer is awaiting moderation.