searching for my daughter

My daughter,Danielle Olsen,was born 3-30-1968 in Darmstadt,Germany.I lived in Dieburg at the time and I gave her up for adoption in Dec.1968 or Jan.1969 at the 'Jugendamt ,I think thats where it was,in Dieburg.My name was,Sonja Olsen,I was 20 years old.I'm desperatly looking for her,she has a brother and sister!