So I'm trying to find out what my Great Grandparents phone number was when they lived in Detroit. They lived at 12340 Westphalia from the early 50's until the early 70's. I don't have any family members that remember it [[there are a few of them still alive) and we don't have any old phone books. I figured, why not ask everyone here if they know how to find out this info. Thanks for any help.