Columbia subject headings:
Harvard subject headings:
Communication and traffic--China--Guizhou Sheng--History--19th ce ntury.
Communication and traffic--China--Guizhou Sheng--History--20th century.
Transportation--China--Guizhou Sheng--History--19th century.
Transportation--China--Guizhou Sheng--History--20th century.
Princeton subject headings:
Communication and traffic--China--Guizhou Sheng--History--19th ce ntury.
Communication and traffic--China--Guizhou Sheng--History--20th century.
Transportation--China--Guizhou Sheng--History--19th century.
Transportation--China--Guizhou Sheng--History--20th century.