The "Musica" of Hermannus Contractus - Hermann von Reichenau 1013-1054 (University of Rochester Press, 2015)
Keywords: Hermannus / Contractus / 1013-1054; Hermann -- von Reichenau -- 1013-1054; Geschichte 1013-1054; Music theory / Early works to 1800; Music theory / History / 500-1400; Music theory; Geschichte; Modalität; Neumenschrift; Quelle; Musikhandschrift; Musiktheorie