An 1823 book was produced (mentioned in RISM in entries on Schuster’s masses) by Schuster’s pupils (possibly specifically by the church-composer Franz Schubert (not... I think?... Franz Schubert (Franz Peter Schubert) (1797-1828)) (Catalogus derer Kirchen Musicalien des Herrn Capell-Meister Joseph Schuster. Armaro VIII. Zusammengetragen von Kirchen Compositeur Franz Schubert. / Anno 1823. / Sein Schüler.) Some of his works are listed in this book (e.g. his G minor mass (autograph 1772) on pages 4-5, as noted in the corresponding RISM entry.)
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