Copland, Aaron. (1900–1990) Signed PhotographSigned photograph of 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. Bold signature dated 1981, on the photograph cover on a Library of Congress program from the 81st Birthday Concert, Coolidge Auditorium with Mezzo Soprano and 20th century music