Cowell, Henry. (1897 - 1965) Five Signed Copyright Registration DocumentsGroup of five partly printed documents, each signed Henry Cowell," by the the pioneering American composer, theorist, pianist, publisher and impressario. Each 2 pages [back to back], 4 to 10 15 16 in. x 8 7 16 inches (27. 6 x 21. 5cm) [New York City], undated. ASCAP ACA Survey Forms, completely filled in by Cowell in ink, registering his compositions "Three Ostinati with Chorales," "Wind Quintet," "Bit," "Prelude and Air," and "Seven Associated