Guitar music by women composers : an annotated catalog / compiled by Janna MacAuslan and Kristan Aspen
Westport, Conn. : Greenwood Press, 1997
MUSIC Ref ML128.G8 M33 1997
M - Scores
M125-129--Solo guitar music
M276-277--Music for guitar and piano
M292-293--Music for two plucked instruments
M1037.4.G8, M1137.4.G8--Guitar with orchestra or string orchestra (includes full scores and solos with piano arrangements)
ML - Music Literature
ML128.G8--Guitar music: Bibliography
ML1015.G9--Books about the guitar
MT - Instruction and Study
MT580-599--Methods, etudes, orchestra studies, etc.
Guitar music
Guitar music (Guitars (2))
Suites (Guitar)
Concertos (Guitar)
Concertos (Guitar with string orchestra)
Guitar with orchestra
...and there are lots more. Do a subject search for "guitar" and see the 120 different subject headings that begin with "guitar."
Guitar music--Bibliography
Guitar music--Discography
Guitar--History
Guitarists
... and lots more. Search "guitar" in the library catalog and find more than 150 books, more than 550 recordings and more than 250 scores.