Concerto for Orchestra - Bartók

Béla Bartók (1841-1904), was a 20th century Hungarian composer.
Bartók completed Concerto for Orchestra in 1943.
To learn more about the composer, visit Béla Bartók on Wikipedia.
For more on the composition, visit Bartók Concerto for Orchestra on Wikipedia.
Performance
Bartók: Konzert für Orchester ∙ hr-Sinfonieorchester ∙ Andrés Orozco-Estrada
Excerpt
Bartók Concerto for Orchestra audio excerpts - Ralph Sauer, Los Angeles Philharmonic on Youtube.
Trombone Parts and Full Score
The full score of Concerto for Orchestra is available on IMSLP.org.
NOTE: IMSLP provides access to public-domain scores and parts, with copyright status varying by country. Users are responsible for observing applicable copyright laws.
Trombone parts are available on IMSLP.org as follows:
Ranges and clefs by Part

More Bartók
Trombone Resources playlist of Bartók with Trombones in the instrumentation.