Columbia subject headings:
Florence (Italy)--Commerce--Spain--Medina del Campo--History.
Medina del Campo (Spain)--Commerce--Italy--Florence--History.
Ruiz, Simón--Correspondence.
Suárez, Baltasar--Correspondence.
Harvard subject headings:
Florence (Italy)--Commerce--Spain--Medina del Campo--History.
Medina del Campo (Spain)--Commerce--Italy--Florence--History.
Ruiz, Simón--Correspondence.
Suárez, Baltasar--Correspondence.
Princeton subject headings:
Florence (Italy)--Commerce--Spain--Medina del Campo--History.
Medina del Campo (Spain)--Commerce--Italy--Florence--History.
Ruiz, Simón, active 1550-1565--Correspondence.