Mike, Go to the SSDI Search at : http://ssdi.genealogy.rootsweb.com/cgi-bin/ssdi.cgi Since all three may have received Social Security benefits there is a good chance you would find them .... especially your father. It gives the death date and frequently the birth date and the state where the social security card was issued. For $7.00 you can also get a copy of their SS application that has all sorts of information on it. Click on the far right hand column after the name ... it gives you a printed letter with all the necessary information for requesting the copy. All you have to do is fill in your name and address and a check for $7.00. Good Luck, Jennifer Pursell