Guide to the tuba repertoire : the new tuba source book / compiled and edited by R. Winston Morris and Daniel Perantoni
Bloomington, IN : Indiana University Press, c2006
MUSIC Ref ML128.T8 T8 2006
The tuba family / by Clifford Bevan. 2nd ed. rev., enl. and updated.
Winchester : Piccolo, 2000
MUSIC ML970.B48 2000
University of Iowa music source book : wind and percussion materials / [faculty members of the University of Iowa School of Music]
[Iowa City] : Paul Anderson, 1986
MUSIC Ref ML128.W5 I48 1986x
ITEA journal, v. 29 (2002)- ML1.T82
T.U.B.A. Journal, v. 4 (1976)-28 (2001) ML1.T82
Brass bulletin--the Library has selected volumes between 1983 and 2003 ML5.B6864
M - Scores
M95-99--Solo tuba music
M264-265--Music for tuba and piano
M1034.T8, M1134.T8--Tuba with orchestra and string orchestra (includes full scores and solos with piano arrangements)
ML - Music Literature
ML128.T8--Tuba music: Bibliography
ML970-973--Books about the tuba
MT - Instruction and Study
MT480-488--Methods, etudes, orchestra studies, etc.
Tuba and piano music
Suites (Tuba and piano)
Concertos (Tuba with band)
Tuba with orchestra
...and there are lots more. Do a subject search for "tuba" and see the 54 different subject headings that begin with "tuba."
... and lots more. Search "tuba" in Encore and find more than 30 books, almost 200 recordings and almost 500 scores.