TubeNet

I’m sure most posters know this resource:

https://imslp.org/wiki/Main_Page" target="_blank
https://imslp.org/wiki/Category:For_tuba" target="_blank
https://archive.org/details/library_of_congress" target="_blank
https://www.sheetmusicplus.com/" target="_blank
https://www.free-scores.com/" target="_blank
https://www.brassexcerpts.com/tuba/downloads/" target="_blank

I've bought this for horn and it is fabulous. Full of music that is now in my personal archives.
https://www.clarinetinstitute.com/store ... ume_1.html" target="_blank
https://www.clarinetinstitute.com/store ... ume_2.html" target="_blank

You can also purchase the "clarinet institute for tuba" digitally:

https://www.clarinetinstitute.com/music ... loads.html" target="_blank

Band music pdf - band music for download.

https://bandmusicpdf.org