Male born in Omaha 1952

I am looking for my father in laws bio family. He was adopted through Catholic charities so we have very limited info, but he was born in Omaha, NE 10/21/1952 and adopted out of Kansas City. It was a closed adoption so I dont know the info his birth mom may have gotten, but he was adopted by a Dr and his wife in Illinois. If any of this sounds right please let me know.