Original: The Choral Approach to Sight-Singing. Vol. II. Emily Crocker. Voice sheet music. Choir sheet music. The Choral Approach to Sight-Singing.
Traducere: Coral Abordarea la Sight-Singing. coruri mari, care pornește de la un pătrat, presupunând că nici o pregătire anterioară. Voi. II.