- From LC: Outlines of the LC Classification schedules: Class M (PDF) | Class M glossary and general guidelines (PDF)
- Class numbers for:
- instrumental music: Solo music: M6-M175 | Duets: M180-M298.5 | Trios-nonets: M300-M990 | Orchestra/string orchestra/band: M1000/M1100/M1200, etc.
Solo instrument(s) with orchestra/string orchestra: M1005/M1105, etc. | Instrumental instruction and study - vocal music: Choral music and dramatic music: M1500/M2000, etc. | Vocal ensembles: M1528/M2018, etc. | Solo vocal music: M1611/M2102, etc.
- instrumental music: Solo music: M6-M175 | Duets: M180-M298.5 | Trios-nonets: M300-M990 | Orchestra/string orchestra/band: M1000/M1100/M1200, etc.
- Shelflisting and cuttering in Class M by Renee McBride
- Cutter numbers: Using the Cutter-Sanborn Three-Figure Author Table
- Cutter numbers for:
- Yale Music Library practices in Class M ° Size | Local practice in cutter numbers | MARC holdings and local practice
- Sound recordings classification