Copland, Aaron. (1900–1990) Signed Facsimile, "Appalachian Spring."From the Brooklyn born composer who, more than any other figure, was instrumental in defining the sound of American classical music in the first half of the 20th century and in helping American composers to attain a new level of worldwide respectability. Vintage dyeline facsimile of the first page of Coplands manuscript for the ballet Appalachian Spring, on a 12. 5 x 18. 75 sheet of imitation vellum, signed later in black felt tip Aaron Copland, May