Good to note: Lists of repertoire are often featured in music-related journals & magazines. Search Music Index and IIMP using the subject "bibliography" to locate repertoire for a specific instrument or ensemble. Example: clarinet AND bibliography

Gee, Harry R. Clarinet solos de concours, 1897-1980: An Annotated Bibliography. Music Library Ref   ML128.C58 G43

Gillespie, James E. Jr. Solos for Unaccompanied Clarinet: An Annotated Bibliography of Published Works. Music Library Ref ML128.C58 G54

Wilkins, Wayne.  The Index of Clarinet Music. Music Library Ref. ML128.C58 W54

Baron, John H. Chamber Music: A Research and Information Guide. Mus Lib Ref  ML128.C4 B37 2010

Lindeman, Stephan D. Concerto: A Research and Information Guide. Mus Lib Ref  ML128.C84 L56 2006

Peters, Harry. The Literature of the Woodwind Quintet. Mus Lib Ref ML128.C4 P5

Scott, William. A Conductor's Repertory of Chamber Music : Compositions for Nine to Fifteen Solo Instruments. Mus Lib Ref ML128.C4 S37 1993

Secrist-Schmedes, Barbera. Wind Chamber Music : Winds with Piano and Woodwind Quintets : An Annotated Guide. Mus Lib Stacks  ML128.C4 S43 1996