Columbia subject headings:
Merchant ships--Netherlands--History--Sources.
Shipping--Asia--History--Sources.
Shipping--Netherlands--History--Sources.
Harvard subject headings:
Merchant ships--Netherlands--History--Sources.
Shipping--Asia--History--Sources.
Shipping--Netherlands--History--Sources.
Princeton subject headings:
Merchant ships--Netherlands--History--Sources.
Shipping--Asia--History--Sources.
Shipping--Netherlands--History--Sources.