Columbia subject headings:
Burroughs, John, 1837-1921.
Natural history--Outdoor books.
Natural history--United States.
Harvard subject headings:
Burroughs, John, 1837-1921.
Natural history--Outdoor books
Natural history--United States
Princeton subject headings:
Burroughs, John, 1837-1921.
Natural history--Outdoor books.
Natural history--United States.