Columbia subject headings:
Emilia-Romagna (Italy)--History.
Este family.
Ferrara (Italy : Province)--History.
Land tenure--Italy--Emilia-Romagna--History.
Land tenure--Italy--Ferrara (Province)--History.
Harvard subject headings:
Emilia-Romagna (Italy)--History.
Este family.
Ferrara (Italy : Province)--History.
Land tenure--Italy--Emilia-Romagna--History.
Land tenure--Italy--Ferrara (Province)--History.
Princeton subject headings:
Emilia-Romagna (Italy)--History.
Este family.
Ferrara (Italy : Province)--History.
Land tenure--Italy--Emilia-Romagna--History.
Land tenure--Italy--Ferrara (Province)--History.