• http://dwerden.com/euphonium-resources.cfm
• http://www.norlanbewley.com/tuba.htm
• http://tuba.music.unt.edu/
• http://www.iteaonline.org/index.php
• http://tuba-euphonium.faculty.asu.edu/?page_id=56
• http://www.armyfieldband.com/pages/education/tuba.html
• http://www.bandworld.org/View.aspx?p=58 
• http://www.georgepalton.com/tuba-exercises.html
• http://www.tuba4u.com/
• http://www.tubaexchange.com/files/TubaExchange-Maint-Booklet.pdf
• http://www.scuc.txed.net/webpages/swest/resources.cfm?subpage=58017
• http://www.musicforbrass.com/articles/breathing-exercises.html
• http://www.instrumentalsavings.com/Tuba-Play-Guide-s/4296.htm
• http://www.instrumentalsavings.com/Sousaphone-Play-Guide-s/4305.htm

Fingering chart