The Axis-49 and Axis-64 are sonomes: sonomes use the harmonic table note=layout on the tonal array.
I set up articles on the sonome and the harmonic table (after considerable work in getting everyone to agree on what to call what).
Since there was no standard on names, there's not much mention of sonome and the harmonic table on the web, although it's now growing.
So: the Wikipedia editors (actually one guy) are proposing deletion of the articles.
If you can add to these articles information that makes them "notable" (evidence that someone, somewhere talked about these things even under a different name), then that would be a good thing.
Ken.