Boulanger, Nadia. (1887–1979) [Diamond, David. (1915–2005)] Signed American Conservatory of Paris Certificate for DAVID DIAMONDOriginal certificate of attendance showing that the young composer David Diamond "has been a student at this school for a period of 2 months during the 1937 session," signed at the foot by Nadia Boulanger, and with a stamped signature of Maurice Ravel. Boulanger's signature very slightly smudged; horizontal folding crease; left edge and lower edge folded back. Overall fine. 9 x 12 inches (23 x 30. 5 cm). From the collection of David Diamond,