The early growth of the European economy warriors and peasants from the seventh to the twelfth century /
Duby, Georges.
Clarke, Howard B.
London Weidenfeld and Nicolson
1974
Translation of: 'Guerriers et paysans vii-xiie siècle : premier essor de l'économie européenne'. Paris : Gallimard, 1973
Bibliography: p.271-277. - Includes index