Columbia subject headings:
Guayaquil (Ecuador)--Economic conditions--18th century.
Guayaquil (Ecuador)--History--18th century.
Natural resources--Ecuador--Guayaquil--History--18th century.
Harvard subject headings:
Guayaquil (Ecuador)--Economic conditions.
Natural resources--Ecuador--Guayaquil--History--18th century.
Princeton subject headings:
Guayaquil (Ecuador)--Economic conditions--History--18th century.
Guayaquil (Ecuador)--History--18th century.
Natural resources--Ecuador--Guayaquil--History--18th century.