A brief history of the Copland-Sessions concerts from the pages of the American Composers Orchestra. (
http://www.americancomposers.org/copland_sessions_perlis.htm
)
Sketch on the composer and his music from pages to accompany the PBS special I hear America Singing. (
http://www.pbs.org/wnet/ihas/composer/barber.html
)
Notes by Steven Ledbetter from the site of the Pro Arte Chamber Orchestra of Boston. (
http://www.proarte.org/notes/barber.htm
)