原文: The Best Concertina Method Yet. I've Been Working On The Railroad. The Man On The Flying Trapeze. Ashley Publications.
译文: The Best Concertina Method Yet for Concertina. 阿什利出版物. 98页. Ashley Mark Publishing Company #AS10251. 出版阿什利马克出版公司. HL.510251. 9X12英寸.