Numeral Cancels Of Italy

hello,

I found this interesting list on Wikipedia about the numeral cancels of Italy:
https://it.wikipedia.org/wiki/Annul...rale_a_punti

At the bottom of the page it is mentioned that those numbers have a ranking from 1 to 13 and then to RRR. Where is this ranking to be found? Does anybody know if it is just a list like on Wikipedia only with the ranking added, or is it a complete catalogue?

There are catalogs for these.It is the same with French numeral cancels.Some are scarcer than others.
https://www.libreriauniversitaria.i...788885335868

https://francomoscadelli.it/wp-cont...tate2019.pdf

Thank you. But I don't find any list or listing for numeral cancels in the PDF. The book instead is probably very useful indeed.

I asked this as in Wikipedia it's mentioned very detailed how the ranking is built (1 to 13 and then up to RRR), but there is no source given for this. So I would like to know where there is a list with this ranking, or if it's a catalog, which catalog is meant in the Wikipedia article, so has this kind of detailed ranking?