Columbia subject headings:
Travelers' writings, American--History and criticism.
Twain, Mark, 1835-1910--Criticism and interpretation.
Harvard subject headings:
Travelers' writings, American--History and criticism.
Twain, Mark, 1835-1910--Criticism and interpretation.
Princeton subject headings:
Travelers' writings, American--History and criticism.
Twain, Mark, 1835-1910--Criticism and interpretation.