ماخذ: The Best Concertina Method Yet. Down By The Riverside. CRUEL WAR IS RAGING, THE. Ashley Publications. 98 pages. HL.510251.
ترجمه: The Best Concertina Method Yet for Concertina. اشلی انتشارات. 98 صفحه. Ashley Mark Publishing Company #AS10251. ISBN 0825653681. 9x12 اینچ.