Nick Byrne's Ophicleide.com
- Dedicated to the performance and study of this rare brass instrument, which was a predecessor of the tuba.
- http://www.ophicleide.com

Matthew Parker Trumpets
- Maker of all types of natural trumpets, in addition to providing a customizing service for modern ones.
- http://www.matthewparkertrumpets.com

Historical Brass Instruments
- Guide to rotary valve trumpets, cornets, serpents, sackbuts, Renaissance and baroque trumpets. From Antique Sound Workshop, dealer in Plymouth, Massachussetts, USA, with online and mail order shopping available.
- http://www.aswltd.com/brass.htm

Historic Brass Society
- An international music organization concerned with the entire range of early brass music, from ancient antiquity and the Biblical period through to the 20th century.
- http://www.historicbrass.org/

Edinburgh University Collection of Historic Musical Instruments
- Listing of names and production dates of cornets and tubas.
- http://www.music.ed.ac.uk/euchmi/ubl/ublh2.html

Edinboro University Trip to Barclay Trumpet Making Workshop
- Biographies, pictures, and journals from the workshop.
- http://www.edinboro.edu/cwis/music/tmw99/home.html