BLNA, 1992-09
Information trouvée : Butterfield, Sir Herbert, 1901-1979
Herbert Butterfield : historian as dissenter / C. T. McIntire, 2004
Information trouvée : dates biographiques, 20150414
Internet, alt.obituaries, 2004-12-04
Information trouvée : Master of Peterhouse 1955-68, Professor of Modern History at Cambridge, 1944-63
The Origins of history / l'auteur, 1981