. . . . . . . . . . "Einführung" . . . . . . . . . "Introduction to musical scales"@en . . . . . . . . . . . . . . . . "Introduction to the study of musical scales" . "Introduction to the study of musical scales"@en . . . . . . "Harmonie (Musik)" . . "musique comparée [études diverses]" . . "Toonstelsels." . . "India society." . . "India Society." . "Tonleiter." . . "Einführung." . . "Musical intervals and scales." . . "Musical intervals and scales" .