Columbia subject headings:
Harvard subject headings:
Italians--Brazil--Rio Grande do Sul (State)
Vineyard laborers--Brazil--Rio Grande do Sul (State)
Vineyard laborers--Brazil--Rio Grande do Sul.
Wine and wine making--Brazil--Rio Grande do Sul (State)
Wine and wine making--Brazil--Rio Grande do Sul.
Princeton subject headings:
Italians--Brazil--Rio Grande do Sul.
Vineyard laborers--Brazil--Rio Grande do Sul.
Wine and wine making--Brazil--Rio Grande do Sul.