* Online retailers: Online retailers like Sheet Music Plus, Musicnotes, and JW Pepper all have a large selection of duet sheet music for flute and trombone. You can search by instrument, genre, and difficulty level.
* Music publishers: Music publishers like Hal Leonard, Alfred Music, and Kendor Music also have a large selection of duet sheet music for flute and trombone. You can order directly from the publisher or through a music store.
* Local music stores: Local music stores may also have a selection of duet sheet music for flute and trombone. You can ask a salesperson for assistance finding what you're looking for.
Here are a few specific examples of duet sheet music for flute and trombone:
* "Andante and Rondo Ungarese" by Carl Maria von Weber
* "Concerto for Flute and Trombone" by Antonio Vivaldi
* "Duo for Flute and Trombone" by Paul Hindemith
* "Sonata for Flute and Trombone" by Francis Poulenc
* "Variations on a Theme by Mozart" by Franz Doppler