Columbia subject headings:
Concord (Mass.)
Emerson, Ralph Waldo, 1803-1882.
Thoreau, Henry David, 1817-1862.
Harvard subject headings:
Concord (Mass.)
Concord (Mass.)--History.
Emerson, Ralph Waldo, 1803-1882
Thoreau, Henry David, 1817-1862
Princeton subject headings:
Concord (Mass.)
Emerson, Ralph Waldo, 1803-1882.
Thoreau, Henry David, 1817-1862.