Oorspronkelijk: Rudiments of Music. Cora B. Ahrens. Voice sheet music. Choir sheet music. Rudiments of Music. Book 8. Composed by Cora B. Ahrens. Books.
Vertaling: Eerste beginselen van muziek. Bassleutel notities, brief namen, lijnen en spaties. Chromatische toonladder, DE.