Looking for Beverly Niemi

Hello,I'm not sure if I'm in the right area or not.I'm trying to help my mother-in-law try to find her birth mom. Birth Mom's name was Beverly Niemi born on 9/26/1933 in Michigan. She graduated High School and was a Nurses Aid. My mother-in-laws name was at birth Barbra Niemi. She was born on 6/1/1957 in St. Ignace, Michigan. The adoption agency was Michigan Children's Aid Society the Upper Peninsula Branch. If Any one can help with this search I would be very great full.