Columbia subject headings:
Harvard subject headings:
Europe--Commerce--Early works to 1800.
Europe--Commerce--History--Sources.
Foreign exchange--Early works to 1800.
Foreign exchange--History--Sources.
Princeton subject headings:
Compagnia Datini.
Italy--Commerce--History--Sources.
Italy--Commerce--Spain.
Merchants--Italy--Biography.
Rocchi, Ambrogio de', approximately 1374-1396.
Spain--Commerce--Italy.