Linked from
The 18 pages that link to Great American Songbook, each with the reason it gives.
Richard RodgersRelated: Songs by Rodgers and Hart became central to this repertoire.
Irving BerlinRelated: Berlin’s standards form a major part of this repertoire.
Traditional popRelated: Its standards became central material for traditional-pop singers.
Rod StewartRelated: Stewart's later recordings brought these standards to a new pop audience.