Columbia subject headings:
Harvard subject headings:
Emilia-Romagna (Italy)--History.
Malatesta family--History--Sources.
Malatesta family--History.
Sogliano al Rubicone (Italy)--History.
Princeton subject headings:
Emilia-Romagna (Italy)--History.
Malatesta family--History--Sources.
Malatesta family--History.
Sogliano al Rubicone (Italy)--History.