Hello Wunderhorn. Amy Beach (U.S., 1867-1944) wrote a symphony called the "Gaelic Symphony" which has been recorded on a widely found commercial label. The interesting Nadia Boulanger, on the other hand, was so affected by the youthful death of her sister, Lilli Boulanger (1893-1918) that Nadia stopped composing and never exceeded the short opus of her dead sister. But Nadia Boulanger's greatest achievements, other than being the first woman to conduct a symphony orchestra, in London, were mainly pedagogical. Her students include Aaron Copland, Roy Harris, Walter Piston and numerous other famous composers.Her sister, Lilli, was the first woman to win the Prix de Rome, for a cantata. Her music, somewhat impressionistic, always very poetic, has also been recorded on several labels. Good luck in your search!