Columbia subject headings:
Industries--Ecuador--Guayaquil--History--17th century.
Shipyards--Ecuador--Guayaquil--History--17th century.
Harvard subject headings:
Industries--Ecuador--Guayaquil--History--17th century.
Shipyards--Ecuador--Guayaquil--History--17th century.
Princeton subject headings:
Guayaquil (Ecuador)--Industries--History--17th century.
Shipyards--Ecuador--Guayaquil--History--17th century.