Symphony No. 5 - Prokofiev
Sergei Prokofiev (1891-1953), was a 20th Century Russian composer.
Prokofiev completed Symphony No. 5 in 1944.
To learn more about the composer, visit SergeiProkofiev on Wikipedia.
For more on the composition, visit Prokifiev Symphony No. 5 on Wikipedia.
Performance
Sergei Prokofiev - Symphony No. 5, Op. 100 (Score)
Excerpts
Prokofiev Symphony No. 5 audio excerpts are available on tromboneexcerpts.org.
Trombone Parts and Full Score
The full score of Symphony No. 5 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 Prokofiev
Trombone Resources playlist of Prokfiev with Trombones in the instrumentation.