What, specifically, are you looking for? What information about them do you already have?
Taking a brief look there's a WWII draft card for a George Henry LANGE, born 20-Jan-1889 in Granville Township, Mercer OH, living in Maria Stein, Mercer, OH. Name of person who would always know his address: Mrs. Margaret LANGE.
The census records show several LANGE families in Mercer Co.