Columbia subject headings:
Abbey, Edward, 1927-1989.
Authors, American--20th century--Biography.
Harvard subject headings:
Abbey, Edward, 1927---Biography.
Abbey, Edward, 1927-1989
Authors, American--20th century--Biography
Environmentalists--United States--Biography
Novelists, American--20th century--Biography
Park rangers--United States--Biography.
Princeton subject headings:
Abbey, Edward, 1927-1989.
Authors, American--20th century--Biography.