Tune books
This list will hopefully includes some important tunebooks that were in print within the past ten years but are now out of print.
One may find them in large libraries.
Alternatively one may inquire the Internet, which can access inventories of distributors and second-hand book stores.
Lilypond and LaTeX were the tools used to typesetting music.
Tunebooks listed here are freely downloadable and ready for printing in Portable Document Format.
More to come...