Columbia subject headings:
Blind--Books and reading--Bibliography--Catalogs.
Frontier and pioneer life in literature--Bibliography--Catalogs.
Frontier and pioneer life--United States--Bibliography--Catalogs.
Library of Congress. National Library Service for the Blind and Physically Handicapped--Catalogs.
Talking books--Bibliography--Catalogs.
Harvard subject headings:
Blind--Books and reading--Bibliography--Catalogs.
Frontier and pioneer life in literature--Bibliography--Catalogs.
Frontier and pioneer life--United States--Bibliography--Catalogs.
Library of Congress. National Library Service for the Blind and Physically Handicapped--Catalogs.
Talking books--Bibliography--Catalogs.
Princeton subject headings: