Hoffman, Ross J.S.
Medieval history
Littlefield, Adams, 1958
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Hall, John W.
Medieval Japan : essays in institutional history
Yale University Press, 1974
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Wellhausen, Julius, 1844-1918
The religio-political factions in early Islam
North-Holland , 1975
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Jeffrey P. Mass
Warrior Government in Early Medieval Japan
Philippine, Yale University1974
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White, Lynn
Medieval technology and social change
Oxford University Press, 1962
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