Columbia subject headings:
Business enterprises--Italy--Lucca--History--To 1500.
Compagnia Ricciardi--Records and correspondence.
Foreign subsidiaries--England--History--To 1500.
Harvard subject headings:
Business enterprises--England--Records and correspondence.
Business enterprises--Italy--Lucca--Records and correspondence.
Lucca (Italy)--Commerce--History--Sources.
Ricciardi (Firm : Lucca, Italy)--History.
Ricciardi (Firm : Lucca, Italy)--Records and correspondence.
Ricciardi family--Correspondence.
Princeton subject headings: