Forrás: Rudiments of Music. Cora B. Ahrens. Voice sheet music. Choir sheet music. Rudiments of Music. Book 6. For Choral, Voice.
Fordítás: Alapismeretek Music. Voice kotta. Kórus kotta. Alapismeretek Music. Komponálta Cora B. Ahrens. A Choral, Voice. Vol 6. Boosey.