Learning Materials in LilyPond (was: removing staff and clef w/o removing bar lines and brackets)

[Paul]

On 07/12/2017 08:50 AM, Karlin High wrote:

> Are you aware of this sight-singing textbook...
> http://www.lightandmatter.com/sight/sight.html
> ...made with Lilypond and LaTeX, with source code available and
> customization encouraged under CC-BY-SA license?

Thanks for this link.  That's a great resource.

Are there other similar collections of free learning materials (public 
domain or creative commons licensed), preferably in LilyPond format?  
(I'm aware of the Mutopia Project.)

Thanks,
-Paul