Columbia subject headings:
Berr, Henri, 1863-1954.
Bloch, Marc, 1886-1944--Correspondence.
Bloch, Marc, 1886-1944.
Europe--History--476-1492.
Historians--France--Correspondence.
Harvard subject headings:
Princeton subject headings:
Berr, Henri--Correspondence.
Bloch, Marc, 1886-1944--Correspondence.
Bloch, Marc, 1886-1944. Sociéte féodale.
Europe--History--476-1492.
Feudalism--Europe.