Need list of Maternity Homes in KC, MO

i am searching for my husbands sister that was given u pfor adoption in 1971 she was born at florence crittenton it is no longer here . his sister was born in april of 71 her mother was just 18 and unmarried she is looking to find her daughter that she hated to give up but had no choice she had no home to live in except for her what is now ex mother n law but she is a very sweet loveing person and she only wanted the best for her little girl her maiden name is lyle