All-Time Greatest Hits is a 3 disc compilation album issued in 1993 by CEMA Special Markets, containing single A-sides released between 1966 and 1978. This album is notable because of the presence of several single-only releases that have not been widely available on CD: "Oklahoma Sunday Morning" (1971), "Manhattan Kansas" (1972), "Wherefore and Why" (1973) and "God Must Have Blessed America" (1977).