Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Portugal--Mondego River Region--History.
Feudalism--Portugal--Mondego River Region--History.
Mondego River Region (Portugal)--Economic conditions.
Peasants--Portugal--Mondego River Region--History.
Princeton subject headings:
Feudalism--Portugal--Mondego River Valley--History.
Land tenure--Portugal--Mondego River Valley--History.
Land use--Portugal--Mondego River Valley--History.
Mondego River Valley (Portugal)--History.
Mondego River Valley (Portugal)--Rural conditions--History.
Social classes--Portugal--Mondego River Valley--History.
Social conflict--Portugal--Mondego River Valley--History.