Deletion of Rulers.org (2nd nomination)

Comment: Not |reliably sourced as notable — one of the two "references" is to itself, but you don't make a thing notable by metasourcing it to its own existence, and the other reference is to the Google Books profile of a book about the ''general'' phenomenon of name-matching databases, offering no way to |verify whether ''this'' particular database is the ''subject'' of enough content in that book to count for anything toward meeting  — and even if it is, it still takes ''more'' than just ''one'' GNG-worthy source to ''pass'' GNG. So no, this sourcing simply isn't good enough
Stance: delete
Cited policy: Wikipedia:Reliable sources (WP:RS||WP:V||WP:GNG)