Do you have a CD or something that showed who produced or distributed it? That's a good place to start. If you provide the song /artist I'm sure someone here would try and help.
Even that could just endup being a huge effort.. b/c it could have been bought and sold many times since the "album" came out.. I was kind of hoping to find some kind of directory listing or search database out there.. it is extremely time consuming the other way.
ASK MICHAEL JACKSON..HE OWNS ALOT OF THE BEATLE SONGS ALSO ASK YOKO ONO ASK WHART ON THIS BOARD..HES A MUSIC / COPYRITE LAWYER