Columbia subject headings:
Harvard subject headings:
Free enterprise--Brazil--São Paulo (State)--History--19th century.
Railroads and state--Brazil--São Paulo (State)--History--19th century.
Railroads--Brazil--São Paulo (State)--Design and construction--History--19th century.
Railroads--Brazil--São Paulo (State)--History--19th century.
Princeton subject headings:
Railroads and state--Brazil--São Paolo.
Railroads--Brazil--São Paolo.