How unmarried fathers establish paternity of a child and obtain visitation and / or custody rights; including basics of the court process; the use of child custody agreements; and related information. (family.findlaw.com)
establishing paternity of children born to unmarried couples (example: through genetic testing) (divorcenet.com)
The general culture is getting so inured to paternity being divorced from matrimony that most folks assume it is easy to establish paternity of a child when the husband isn't the father. (gregoryforman.com)