Columbia subject headings:
Harvard subject headings:
Authors, American--19th century--Biography
Twain, Mark, 1835-1910
Twain, Mark, 1835-1910--Appreciation.
Twain, Mark, 1835-1910--Criticism and interpretation.
Twain, Mark, 1835-1910--Influence.
Princeton subject headings:
Twain, Mark, 1835-1910--Appreciation.
Twain, Mark, 1835-1910--Criticism and interpretation.