The official websiteArchived 2017-09-12 at the Wayback Machine adopts the "G-15" orthography (with a hyphen) in order to distinguish an abbreviated reference to this group -- contrasts with other similarly named entities.
The official websiteArchived 2017-09-12 at the Wayback Machine adopts the "G-15" orthography (with a hyphen) in order to distinguish an abbreviated reference to this group -- contrasts with other similarly named entities.