There is a masters thesis by Jurgen Ehlers called "The Extant Organs of Arp Schnitger-Recent Developments on Today's Organ World." There are articles titled "Arp Schnitger part III" and "part IV" by Peggy Kelley Reinburg about some of Arp Schnitger's organs. There is a translated version of "Arp Schnitger und Seine Schule," in English, "Arp Schnitger and his school". This version includes the foreword and preface and begins to talk about Schnitger's ancestors. There is another article titled "Arp Schnitger and his Organs" by W.L. Sumner. Finally there is an article on the "Scalings for Representative Schnitger Organs."