Columbia subject headings:
Billy, the Kid.
Frontier and pioneer life--Southwest, New.
Outlaws--Southwest, New--Biography.
Southwest, New--History--1848-
Harvard subject headings:
Billy, the Kid
Frontier and pioneer life--Southwest, New
Outlaws--Southwest, New--Biography
Southwest, New--History--1848-
Princeton subject headings:
Billy, the Kid
Frontier and pioneer life--Southwest, New.
Outlaws--Southwest, New--Biography.
Southwest, New--History--1848-