Evansville maternity home for unwed mothers

I am looking for any mothers or children who were in any way involved with the unwed mothers Christian home on Fulton Street in Evansville, Indiana. My child, a female, was born 7-2or3,1969. This institution was all about secrecy up to and including all mothers and children having the same last name of "Christian." I'm not sure how to get around this and if the birth certificates reflected this bogus name or the real name of the mother. Thanks