Columbia subject headings:
Natural history.
Naturalists--United States--Biography.
Presidents--United States--Biography.
Roosevelt, Theodore, 1858-1919--Books and reading.
Roosevelt, Theodore, 1858-1919.
Harvard subject headings:
Conservationists--United States--Biography
Natural history.
Naturalists--United States--Biography
Nature conservation--United States--History--20th century.
Presidents--United States--Biography
Roosevelt, Theodore, 1858-1919--Books and reading.
Roosevelt, Theodore, 1858-1919--Views on natural history.
Roosevelt, Theodore, 1858-1919.
Princeton subject headings:
Natural history.
Naturalists--United States--Biography.
Presidents--United States--Biography.
Roosevelt, Theodore, 1858-1919--Books and reading.
Roosevelt, Theodore, 1858-1919.