Bartók's Field Recordings. Links to Bartók's recording of the folk song used in the first movement of the Improvisations, Op. 20 and hundreds of other folk tunes. Institute for Musicology, Hungarian Academy of Sciences via db.zti.hu.
Folk Music of Hungary. Links to the 1950 Smithsonian Folkways collection, including recordings made by Bartók, via folkways.si.edu.
San Francisco Symphony Website on the Rite of Spring. Includes audio and video materials concerning the premiere, via keepingscore.org.
A Film on Diaghilev and the Ballet Russes. This was part of the National Gallery exhibit Diaghilev and the Ballet Russes: When Art Danced with Music, via nga.gov.