Tuba-Euphonium Blog
- Discussion of practical aspects of playing double bell euphonium in church. Maintained by David Werden.
- http://www.dwerden.com/blog3/index.cfm

The Metropolitan Museum of Art: Double Bell Euphonium
- Photo and brief history of 1936 instrument made by Conn, from the museum's permanent collection.
- http://www.metmuseum.org/Works_of_Art/artworks.asp?ReplicationId=%7B87E99032-644A-4118-A724-3AC8B232DF45%7D

The Double Bell Euphonium
- Extract from scholarly paper by Dr. Edward Keith Mallett of Michigan documents construction of a modern instrument, with photos and detailed specifications.
- http://www.mmis.us/wf/MMIS/DB/euph.html

Euphonium Net
- Biographical information, media, recommended euphonium study, and educational resources.
- http://www.euphonium.net/

Euphonium Studies from JAPAN
- Index of CD's made by Japanese players, information about the webmaster, links to euphonium players' sites
- http://www.euphstudy.com/international/

Baritone or Euphonium??
- Detailed article on the differences between the Baritone Horn and Euphonium. Includes charts and pictures contrasting the two in context to the definitions of various popular brands, including common bore size, bell size, and taper.
- http://www.dwerden.com/bareuph.asp

Confessions of an LCB Euphonium Player
- Brief, highly favorable definition of the Euphonium, particularly its part in Military and Concert Bands.
- http://www.math.purdue.edu/~bell/LCB/euph.html

Euphonium Music Guide
- Extensive directory of Euphonium sheet music.
- http://www.dwerden.com/emg/index.htm