原文: Variations on Thirds. Performance material is available on a rental basis from the publisher. Henry Cowell. 1897-1965. Modern.
译文: 亨利科维. Variations on Thirds composed by Henry Cowell. For 2 solo violas, strings. 现代. 满分. 持续11分钟30秒. 出版版彼得斯. PE.P06472.