Columbia subject headings:
Cowboys--Texas--Biography.
Cowboys--Texas--History.
Ranch life--Texas--History.
Texas--Biography.
Texas--Social life and customs.
Harvard subject headings:
Cowboys--Texas--Biography
Cowboys--Texas--History.
Ranch life--Texas--History
Texas--Biography
Texas--Social life and customs
Princeton subject headings:
Cowboys--Texas--Biography.
Cowboys--Texas--History.
Ranch life--Texas--History.
Texas--Biography.
Texas--Social life and customs.