Edna Hibel - Lithograph Mother and Children

Edna Hibel Mother and Children. It's 11 x 14 unframed. I do believe this is a Lithograph but not 100% positive, I haven't been able to tell/ It was hanging in my mother's house for t least 40 years. If anyone might have information about this picture my family would appreciate it.
There is a sticker on the back that says Gallery Art Center, 3722 W. 12 Mile Rd Berkely Michigan