Entry for single Dum Dum (Marble Breaks and Iron Breaks) by The Deejays on rateyourmusic.com
Entry for single Marble Breaks and Iron Bends by Peter Fenton
billboard.com
Entry for US single Marble Breaks and Iron Bends on Billboard (limited access due to requiring subscription)
chartsurfer.de
German entry for international success of US single Marble Breaks and Iron Bends on chartsurfer.de (Höchstposition = "peak position", Chartwochen = "no. of charting weeks", Erste Notierung = "first listing", Letzte Notierung = "last listing") In German, but does not require subscription to view as does Billboard entry.
