The index of violin music / compiled and edited by Wayne Wilkins.
Magnolia, Ark. : Music Register, 1973, and supplements to 1977
MUSIC Ref ML128.V4 W53
Music for solo violin unaccompanied : a catalogue of published and unpublished works from the seventeenth century to 1989 / compiled by Harry Edlund
High Wycombe, Bucks, England : Peter Marcan Publications, 1989
MUSIC Ref ML128.V4 E35 1989
String music in print / by Margaret K. Farish
New York : R. R. Bowker Co., 1965, and supplements to 1984
MUSIC Ref ML128.S7 F4
M - Scores
M40-44--Solo violin music
M217-223--Music for violin and piano
M1012-1013, M1112-1113--Violin with orchestra and string orchestra (includes full scores and solos with piano arrangements)
ML - Music Literature
ML128.V4--Violin music: Bibliography
ML800-897--Books about the violin
MT - Instruction and Study
MT260-279.7--Methods, etudes, orchestra studies, etc.
Violin music
Violin and piano music
Suites (Violin)
Concertos (Violin)
Concertos (Violin with string orchestra)
Violin with orchestra
...and there are lots more. Do a subject search for "violin" and see the 255 different subject headings that begin with "violin."
Violin music--Bibliography
Violin music--Discography
Violin--History
Violinists
... and lots more. Search "violin" in the library catalog and find more than 300 books, more than 2500 recordings and more than 2200 scores.