The ABCs of Strings
- Janice Tucker Rhoda's instructional series for strings.
- http://www.abcsofstrings.com/

AAMusicStore.com
- Large selection of popular sheet music, musical instruments and accessories.
- http://www.aamusicstore.com

Manontroppo Music
- Offers arrangements for string ensembles. Some samples are included, and mail ordering.
- http://www3.sympatico.ca/nada.s/Manontroppo.html

Joseph Patelson Music House
- Classical sheet music store with extensive offerings for all instruments.
- http://www.patelson.com/

Lemur Music
- Offers sheet music, instruments, supplies, and misceallany for the Double Bass.
- http://www.lemur-music.com/

Discordia Music, Inc.
- Publisher of new, transcribed, and arranged music for the Double Bass.
- http://www.discordia-music.com/

Mona Lisa Sound
- Offering Rock string quartet sheet music made famous by Hampton String Quartet.
- http://www.monalisasound.com/

Lamoureux Violins
- Sheet music, books, strings, supplies and accessories for classical musicians; Teaching material and aids for traditional and Suzuki method.
- http://www.lviolins.com/