Columbia subject headings:
Authors, American--19th century--Biography.
Children's writings, American.
Twain, Mark, 1835-1910.
Harvard subject headings:
Authors, American--19th century--Biography
Children's writings, American.
Twain, Mark, 1835-1910--Biography.
Princeton subject headings:
Authors, American--19th century--Biography.
Authors, American.
Children's writings, American.
Children's writings.
Clemens, Susy, 1872-1896.
Twain, Mark, 1835-1910.