Constance Cochnower Virtue (6 January 1905 – 21 February 1992) was an American composer and organist who developed a musical notation system called the Virtue Notagraph.
Constance Cochnower Virtue (6 January 1905 – 21 February 1992) was an American composer and organist who developed a musical notation system called the Virtue Notagraph. (en)
Constance Cochnower Virtue (6 January 1905 – 21 February 1992) was an American composer and organist who developed a musical notation system called the Virtue Notagraph. (en)