| M80–M84 | Horn alone: |
| M80 | Collections (more than one composer) |
| M81 | Original works: Collections (one composer) |
| M82 | Original works: Separate |
| M83 | Arrangements: Collections (one composer) |
| M84 | Arrangements: separate works |
| M255–M259 | Horn with piano accompaniment: |
| M255 | Collections (more than one composer) |
| M256 | Original works: Collections (one composer) |
| M257 | Original works: Separate |
| M258 | Arrangements: Collections (one composer) |
| M259 | Arrangements: Separate works |
| M288–M289 | Duets for two wind instruments (of all kinds): |
| M288 | Collections |
| M289 | Separate works |
| M290–M291 | Duets—one stringed and one wind instrument |
| M296–M297 | Duets—one wind and one plucked instrument |
| M315–M319 | Piano and two wind instruments |
| M320–M324 | Piano, one stringed, and one wind instrument |
| M335–M339 | Piano, one wind, and one plucked instrument |
| M355–M359 | Three wind instruments |
| M360–M364 | Three stringed and wind instruments |
| M375–M379 | Three wind and plucked instruments |
Concertos and similar pieces
| M1028 | Horn with orchestra, full scores |
| M1028.5 | Cadenzas for such works |
| M1029 | Horn with orchestra, piano reductions |
| M1128 | Horn with string orchestra, full scores |
| M1128.5 | Cadenzas for such works |
| M1129 | Horn with string orchestra, piano reductions |
Horn Studies and Methods
| MT420 | General works |
| MT422 | Systems and methods |
| MT423 | Teaching pieces |
| MT424 | Instructive editions |
| MT425 | Studies and exercises |
| MT426 | Orchestral studies (excerpts) |
| MT427 | Two horns |
| MT428 | Self-instructors |
Classification Numbers for Books about the Horn
| ML128 .T78 | Horn bibliographies |
| ML955 | General works |
| ML956 | Construction |
| ML957 | Music and playing |
