Deletion of Mesoregion

Comment: mdash;meets the |general notability guideline as used in e.g. the following sources: http://books.google.com/books?id=wXnI-w9SAq0C&pg=PA80, http://books.google.com/books?id=iU8edMhHrZIC&pg=PA131, http://books.google.com/books?id=6RveDmHbIv8C&pg=PA19.  Also, notability is not recursive
Stance: keep
Cited policy: Wikipedia:Notability (WP:N)