Columbia subject headings:
Harvard subject headings:
Conservationists--United States--Biography
McFarland, J. Horace (John Horace), 1859-1948.
Naturalists--United States--Biography
Nature conservation--United States--History
Princeton subject headings:
Conservationists--United States--Biography.
McFarland, J. Horace (John Horace), 1859-1948.
Naturalists--United States--Biography.
Nature conservation--United States--History.