image is a derivative work of the following images: File:Soprano_Extension_in_C.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2010-02-21T19:24:57Z Anthony...
File:Baritone Extension in C.svg is a vector version of this file. It should be used in place of this JPG file when not inferior. File:RealBaritoneExtension...
