If you are looking for an URTEXT, classical vocal technical tutors, orchestral scores, CCCMusicLibrary probably has it. The Library has hundreds of recital pieces for string and wind instruments, such as transcriptions, sonatas, concertos, all with piano accompaniments. There is a very large collection of songs, from national music through to popular songs, film and theatre, opera arias and German lieder.
There are many rare curios worth a look. The above photo shows an early lithographic print of Czerny exercises, for example. Or there is the vintage collection of Tex Morton cowboy guitar albums, Hawaiian guitar manuals, and antique Australian music folios. The Library also keeps original handwritten scores of local composers.