The trombone : the instrument and its music / Robin Gregory
New York : Praeger, 1973
MUSIC ML965.G74
Trombone chamber music : an annotated bibliography / by Harry J. Arling. 2nd ed., rev. & enl.
Nashville, TN : Brass Press, c1983
MUSIC Ref ML128.T76 A7 1983
Annotated guide to bass trombone literature / by Thomas G. Everett. 3rd ed., rev. and enl.
Nashville, TN : Brass Press, c1985
MUSIC Ref ML128.T76 E9 1985
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
ITA journal, v. 1 (1972)- ML1.I86; also under earlier title, Journal - International Trombone Association
Newsletter of the International Trombone Association, v. 1 (1974) - 8 (1981) ML1.N765
See also:
Brass bulletin--the Library has selected volumes between 1983 and 2003
M - Scores
M90-94--Solo trombone music
M262-263--Music for trombone and piano
M1032-1033, M1132-1133--Trombone with orchestra and string orchestra (includes full scores and solos with piano arrangements)
ML - Music Literature
ML128.T76--Trombone music: Bibliography
ML965-968--Books about the trombone
MT - Instruction and Study
MT460-472--Methods, etudes, orchestra studies, etc.
Trombone music
Trombone and piano music
Suites (Trombone)
Concertos (Trombone)
Concertos (Trombone with string orchestra)
Trombone with orchestra
...and there are lots more. Do a subject search for "trombone" and see the 99 different subject headings that begin with "trombone."
Trombone music--Bibliography
Trombone music--Discography
Trombone--History
... and lots more. Search "trombone" in the library catalog and find more than 40 books, more than 300 recordings and more than 750 scores.