Columbia subject headings:
Voyages and travels.
Harvard subject headings:
Europe--Description and travel
Fiction
Middle East--Description and travel
Twain, Mark, 1835-1910--Journeys--Europe.
Twain, Mark, 1835-1910--Journeys--Middle East.
Twain, Mark, 1835-1910--Journeys--West (U.S.).
Twain, Mark, 1835-1910--Travel--Europe.
Twain, Mark, 1835-1910--Travel--Middle East.
Twain, Mark, 1835-1910--Travel--West (U.S.).
Voyages and travels
West (U.S.)--Description and travel
Princeton subject headings:
Authors, American--19th century--Travel--West (U.S.).
Fiction.
Twain, Mark, 1835-1910--Travel--West (U.S.).
West (U.S.)--Description and travel.